S21Not billable, use a more specific code below
Open wound of thorax
In Injuries to the thorax (S20-S29), chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes
288 billable codes under S21: 36 are an MCC, 24 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.
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Instructional notes
Excludes1: not coded here, use a different code
- traumatic amputation (partial) of thorax (S28.1)
Code also: add a code for this too, order depends on the encounter
Also applies, from Injuries to the thorax (S20-S29)
These notes sit on S20-S29 and apply to every code under it, including S21.
Includes: conditions that are coded here
- injuries of breast
- injuries of chest (wall)
- injuries of interscapular area
Excludes2: not included here, code separately if applicable
- burns and corrosions (T20-T32)
- effects of foreign body in bronchus (T17.5)
- effects of foreign body in esophagus (T18.1)
- effects of foreign body in lung (T17.8)
- effects of foreign body in trachea (T17.4)
- frostbite (T33-T34)
- injuries of axilla
- injuries of clavicle
- injuries of scapular region
- injuries of shoulder
- insect bite or sting, venomous (T63.4)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers 7th character use and coding of injuries, fractures, burns, drug and toxic effects, abuse and neglect, and complications of care (S00-T88).
- Application of 7th Characters in Chapter 19 (page 77)
- Coding of Injuries (page 78)
- Coding of Traumatic Fractures (page 79)
- Coding of Burns and Corrosions (page 80)
- Adverse Effects, Poisoning, Underdosing and Toxic Effects (page 82)
- Adult and child abuse, neglect and other maltreatment (page 85)
- Complications of care (page 85)
All codes under S21
S21 can't be used on a claim. Pick a billable code below; grey headings group them.
- S21.0Open wound of breast
- S21.00Unspecified open wound of breast
- S21.001Unspecified open wound of right breast
- S21.001AUnspecified open wound of right breast, initial encounter
- S21.001DUnspecified open wound of right breast, subsequent encounter
- S21.001SUnspecified open wound of right breast, sequela
- S21.002Unspecified open wound of left breast
- S21.002AUnspecified open wound of left breast, initial encounter
- S21.002DUnspecified open wound of left breast, subsequent encounter
- S21.002SUnspecified open wound of left breast, sequela
- S21.009Unspecified open wound of unspecified breast
- S21.009AUnspecified open wound of unspecified breast, initial encounter
- S21.009DUnspecified open wound of unspecified breast, subsequent encounter
- S21.009SUnspecified open wound of unspecified breast, sequela
- S21.01Laceration without foreign body of breast
- S21.011Laceration without foreign body of right breast
- S21.011ALaceration without foreign body of right breast, initial encounter
- S21.011DLaceration without foreign body of right breast, subsequent encounter
- S21.011SLaceration without foreign body of right breast, sequela
- S21.012Laceration without foreign body of left breast
- S21.012ALaceration without foreign body of left breast, initial encounter
- S21.012DLaceration without foreign body of left breast, subsequent encounter
- S21.012SLaceration without foreign body of left breast, sequela
- S21.019Laceration without foreign body of unspecified breast
- S21.019ALaceration without foreign body of unspecified breast, initial encounter
- S21.019DLaceration without foreign body of unspecified breast, subsequent encounter
- S21.019SLaceration without foreign body of unspecified breast, sequela
- S21.02Laceration with foreign body of breast
- S21.021Laceration with foreign body of right breast
- S21.021ALaceration with foreign body of right breast, initial encounter
- S21.021DLaceration with foreign body of right breast, subsequent encounter
- S21.021SLaceration with foreign body of right breast, sequela
- S21.022Laceration with foreign body of left breast
- S21.022ALaceration with foreign body of left breast, initial encounter
- S21.022DLaceration with foreign body of left breast, subsequent encounter
- S21.022SLaceration with foreign body of left breast, sequela
- S21.029Laceration with foreign body of unspecified breast
- S21.029ALaceration with foreign body of unspecified breast, initial encounter
- S21.029DLaceration with foreign body of unspecified breast, subsequent encounter
- S21.029SLaceration with foreign body of unspecified breast, sequela
- S21.03Puncture wound without foreign body of breast
- S21.031Puncture wound without foreign body of right breast
- S21.031APuncture wound without foreign body of right breast, initial encounter
- S21.031DPuncture wound without foreign body of right breast, subsequent encounter
- S21.031SPuncture wound without foreign body of right breast, sequela
- S21.032Puncture wound without foreign body of left breast
- S21.032APuncture wound without foreign body of left breast, initial encounter
- S21.032DPuncture wound without foreign body of left breast, subsequent encounter
- S21.032SPuncture wound without foreign body of left breast, sequela
- S21.039Puncture wound without foreign body of unspecified breast
- S21.039APuncture wound without foreign body of unspecified breast, initial encounter
- S21.039DPuncture wound without foreign body of unspecified breast, subsequent encounter
- S21.039SPuncture wound without foreign body of unspecified breast, sequela
- S21.04Puncture wound with foreign body of breast
- S21.041Puncture wound with foreign body of right breast
- S21.041APuncture wound with foreign body of right breast, initial encounter
- S21.041DPuncture wound with foreign body of right breast, subsequent encounter
- S21.041SPuncture wound with foreign body of right breast, sequela
- S21.042Puncture wound with foreign body of left breast
- S21.042APuncture wound with foreign body of left breast, initial encounter
- S21.042DPuncture wound with foreign body of left breast, subsequent encounter
- S21.042SPuncture wound with foreign body of left breast, sequela
- S21.049Puncture wound with foreign body of unspecified breast
- S21.049APuncture wound with foreign body of unspecified breast, initial encounter
- S21.049DPuncture wound with foreign body of unspecified breast, subsequent encounter
- S21.049SPuncture wound with foreign body of unspecified breast, sequela
- S21.05Open bite of breast
- S21.051Open bite of right breast
- S21.051AOpen bite of right breast, initial encounter
- S21.051DOpen bite of right breast, subsequent encounter
- S21.051SOpen bite of right breast, sequela
- S21.052Open bite of left breast
- S21.052AOpen bite of left breast, initial encounter
- S21.052DOpen bite of left breast, subsequent encounter
- S21.052SOpen bite of left breast, sequela
- S21.059Open bite of unspecified breast
- S21.059AOpen bite of unspecified breast, initial encounter
- S21.059DOpen bite of unspecified breast, subsequent encounter
- S21.059SOpen bite of unspecified breast, sequela
- S21.1Open wound of front wall of thorax without penetration into thoracic cavity
- S21.10Unspecified open wound of front wall of thorax without penetration into thoracic cavity
- S21.101Unspecified open wound of right front wall of thorax without penetration into thoracic cavity
- S21.101AUnspecified open wound of right front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.101DUnspecified open wound of right front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.101SUnspecified open wound of right front wall of thorax without penetration into thoracic cavity, sequela
- S21.102Unspecified open wound of left front wall of thorax without penetration into thoracic cavity
- S21.102AUnspecified open wound of left front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.102DUnspecified open wound of left front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.102SUnspecified open wound of left front wall of thorax without penetration into thoracic cavity, sequela
- S21.109Unspecified open wound of unspecified front wall of thorax without penetration into thoracic cavity
- S21.109AUnspecified open wound of unspecified front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.109DUnspecified open wound of unspecified front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.109SUnspecified open wound of unspecified front wall of thorax without penetration into thoracic cavity, sequela
- S21.11Laceration without foreign body of front wall of thorax without penetration into thoracic cavity
- S21.111Laceration without foreign body of right front wall of thorax without penetration into thoracic cavity
- S21.111ALaceration without foreign body of right front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.111DLaceration without foreign body of right front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.111SLaceration without foreign body of right front wall of thorax without penetration into thoracic cavity, sequela
- S21.112Laceration without foreign body of left front wall of thorax without penetration into thoracic cavity
- S21.112ALaceration without foreign body of left front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.112DLaceration without foreign body of left front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.112SLaceration without foreign body of left front wall of thorax without penetration into thoracic cavity, sequela
- S21.119Laceration without foreign body of unspecified front wall of thorax without penetration into thoracic cavity
- S21.119ALaceration without foreign body of unspecified front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.119DLaceration without foreign body of unspecified front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.119SLaceration without foreign body of unspecified front wall of thorax without penetration into thoracic cavity, sequela
- S21.12Laceration with foreign body of front wall of thorax without penetration into thoracic cavity
- S21.121Laceration with foreign body of right front wall of thorax without penetration into thoracic cavity
- S21.121ALaceration with foreign body of right front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.121DLaceration with foreign body of right front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.121SLaceration with foreign body of right front wall of thorax without penetration into thoracic cavity, sequela
- S21.122Laceration with foreign body of left front wall of thorax without penetration into thoracic cavity
- S21.122ALaceration with foreign body of left front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.122DLaceration with foreign body of left front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.122SLaceration with foreign body of left front wall of thorax without penetration into thoracic cavity, sequela
- S21.129Laceration with foreign body of unspecified front wall of thorax without penetration into thoracic cavity
- S21.129ALaceration with foreign body of unspecified front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.129DLaceration with foreign body of unspecified front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.129SLaceration with foreign body of unspecified front wall of thorax without penetration into thoracic cavity, sequela
- S21.13Puncture wound without foreign body of front wall of thorax without penetration into thoracic cavity
- S21.131Puncture wound without foreign body of right front wall of thorax without penetration into thoracic cavity
- S21.131APuncture wound without foreign body of right front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.131DPuncture wound without foreign body of right front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.131SPuncture wound without foreign body of right front wall of thorax without penetration into thoracic cavity, sequela
- S21.132Puncture wound without foreign body of left front wall of thorax without penetration into thoracic cavity
- S21.132APuncture wound without foreign body of left front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.132DPuncture wound without foreign body of left front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.132SPuncture wound without foreign body of left front wall of thorax without penetration into thoracic cavity, sequela
- S21.139Puncture wound without foreign body of unspecified front wall of thorax without penetration into thoracic cavity
- S21.139APuncture wound without foreign body of unspecified front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.139DPuncture wound without foreign body of unspecified front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.139SPuncture wound without foreign body of unspecified front wall of thorax without penetration into thoracic cavity, sequela
- S21.14Puncture wound with foreign body of front wall of thorax without penetration into thoracic cavity
- S21.141Puncture wound with foreign body of right front wall of thorax without penetration into thoracic cavity
- S21.141APuncture wound with foreign body of right front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.141DPuncture wound with foreign body of right front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.141SPuncture wound with foreign body of right front wall of thorax without penetration into thoracic cavity, sequela
- S21.142Puncture wound with foreign body of left front wall of thorax without penetration into thoracic cavity
- S21.142APuncture wound with foreign body of left front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.142DPuncture wound with foreign body of left front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.142SPuncture wound with foreign body of left front wall of thorax without penetration into thoracic cavity, sequela
- S21.149Puncture wound with foreign body of unspecified front wall of thorax without penetration into thoracic cavity
- S21.149APuncture wound with foreign body of unspecified front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.149DPuncture wound with foreign body of unspecified front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.149SPuncture wound with foreign body of unspecified front wall of thorax without penetration into thoracic cavity, sequela
- S21.15Open bite of front wall of thorax without penetration into thoracic cavity
- S21.151Open bite of right front wall of thorax without penetration into thoracic cavity
- S21.151AOpen bite of right front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.151DOpen bite of right front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.151SOpen bite of right front wall of thorax without penetration into thoracic cavity, sequela
- S21.152Open bite of left front wall of thorax without penetration into thoracic cavity
- S21.152AOpen bite of left front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.152DOpen bite of left front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.152SOpen bite of left front wall of thorax without penetration into thoracic cavity, sequela
- S21.159Open bite of unspecified front wall of thorax without penetration into thoracic cavity
- S21.159AOpen bite of unspecified front wall of thorax without penetration into thoracic cavity, initial encounter
- S21.159DOpen bite of unspecified front wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.159SOpen bite of unspecified front wall of thorax without penetration into thoracic cavity, sequela
- S21.2Open wound of back wall of thorax without penetration into thoracic cavity
- S21.20Unspecified open wound of back wall of thorax without penetration into thoracic cavity
- S21.201Unspecified open wound of right back wall of thorax without penetration into thoracic cavity
- S21.201AUnspecified open wound of right back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.201DUnspecified open wound of right back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.201SUnspecified open wound of right back wall of thorax without penetration into thoracic cavity, sequela
- S21.202Unspecified open wound of left back wall of thorax without penetration into thoracic cavity
- S21.202AUnspecified open wound of left back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.202DUnspecified open wound of left back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.202SUnspecified open wound of left back wall of thorax without penetration into thoracic cavity, sequela
- S21.209Unspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity
- S21.209AUnspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.209DUnspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.209SUnspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity, sequela
- S21.21Laceration without foreign body of back wall of thorax without penetration into thoracic cavity
- S21.211Laceration without foreign body of right back wall of thorax without penetration into thoracic cavity
- S21.211ALaceration without foreign body of right back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.211DLaceration without foreign body of right back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.211SLaceration without foreign body of right back wall of thorax without penetration into thoracic cavity, sequela
- S21.212Laceration without foreign body of left back wall of thorax without penetration into thoracic cavity
- S21.212ALaceration without foreign body of left back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.212DLaceration without foreign body of left back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.212SLaceration without foreign body of left back wall of thorax without penetration into thoracic cavity, sequela
- S21.219Laceration without foreign body of unspecified back wall of thorax without penetration into thoracic cavity
- S21.219ALaceration without foreign body of unspecified back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.219DLaceration without foreign body of unspecified back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.219SLaceration without foreign body of unspecified back wall of thorax without penetration into thoracic cavity, sequela
- S21.22Laceration with foreign body of back wall of thorax without penetration into thoracic cavity
- S21.221Laceration with foreign body of right back wall of thorax without penetration into thoracic cavity
- S21.221ALaceration with foreign body of right back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.221DLaceration with foreign body of right back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.221SLaceration with foreign body of right back wall of thorax without penetration into thoracic cavity, sequela
- S21.222Laceration with foreign body of left back wall of thorax without penetration into thoracic cavity
- S21.222ALaceration with foreign body of left back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.222DLaceration with foreign body of left back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.222SLaceration with foreign body of left back wall of thorax without penetration into thoracic cavity, sequela
- S21.229Laceration with foreign body of unspecified back wall of thorax without penetration into thoracic cavity
- S21.229ALaceration with foreign body of unspecified back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.229DLaceration with foreign body of unspecified back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.229SLaceration with foreign body of unspecified back wall of thorax without penetration into thoracic cavity, sequela
- S21.23Puncture wound without foreign body of back wall of thorax without penetration into thoracic cavity
- S21.231Puncture wound without foreign body of right back wall of thorax without penetration into thoracic cavity
- S21.231APuncture wound without foreign body of right back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.231DPuncture wound without foreign body of right back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.231SPuncture wound without foreign body of right back wall of thorax without penetration into thoracic cavity, sequela
- S21.232Puncture wound without foreign body of left back wall of thorax without penetration into thoracic cavity
- S21.232APuncture wound without foreign body of left back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.232DPuncture wound without foreign body of left back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.232SPuncture wound without foreign body of left back wall of thorax without penetration into thoracic cavity, sequela
- S21.239Puncture wound without foreign body of unspecified back wall of thorax without penetration into thoracic cavity
- S21.239APuncture wound without foreign body of unspecified back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.239DPuncture wound without foreign body of unspecified back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.239SPuncture wound without foreign body of unspecified back wall of thorax without penetration into thoracic cavity, sequela
- S21.24Puncture wound with foreign body of back wall of thorax without penetration into thoracic cavity
- S21.241Puncture wound with foreign body of right back wall of thorax without penetration into thoracic cavity
- S21.241APuncture wound with foreign body of right back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.241DPuncture wound with foreign body of right back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.241SPuncture wound with foreign body of right back wall of thorax without penetration into thoracic cavity, sequela
- S21.242Puncture wound with foreign body of left back wall of thorax without penetration into thoracic cavity
- S21.242APuncture wound with foreign body of left back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.242DPuncture wound with foreign body of left back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.242SPuncture wound with foreign body of left back wall of thorax without penetration into thoracic cavity, sequela
- S21.249Puncture wound with foreign body of unspecified back wall of thorax without penetration into thoracic cavity
- S21.249APuncture wound with foreign body of unspecified back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.249DPuncture wound with foreign body of unspecified back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.249SPuncture wound with foreign body of unspecified back wall of thorax without penetration into thoracic cavity, sequela
- S21.25Open bite of back wall of thorax without penetration into thoracic cavity
- S21.251Open bite of right back wall of thorax without penetration into thoracic cavity
- S21.251AOpen bite of right back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.251DOpen bite of right back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.251SOpen bite of right back wall of thorax without penetration into thoracic cavity, sequela
- S21.252Open bite of left back wall of thorax without penetration into thoracic cavity
- S21.252AOpen bite of left back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.252DOpen bite of left back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.252SOpen bite of left back wall of thorax without penetration into thoracic cavity, sequela
- S21.259Open bite of unspecified back wall of thorax without penetration into thoracic cavity
- S21.259AOpen bite of unspecified back wall of thorax without penetration into thoracic cavity, initial encounter
- S21.259DOpen bite of unspecified back wall of thorax without penetration into thoracic cavity, subsequent encounter
- S21.259SOpen bite of unspecified back wall of thorax without penetration into thoracic cavity, sequela
- S21.3Open wound of front wall of thorax with penetration into thoracic cavity
- S21.30Unspecified open wound of front wall of thorax with penetration into thoracic cavity
- S21.301Unspecified open wound of right front wall of thorax with penetration into thoracic cavity
- S21.301AUnspecified open wound of right front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.301DUnspecified open wound of right front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.301SUnspecified open wound of right front wall of thorax with penetration into thoracic cavity, sequela
- S21.302Unspecified open wound of left front wall of thorax with penetration into thoracic cavity
- S21.302AUnspecified open wound of left front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.302DUnspecified open wound of left front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.302SUnspecified open wound of left front wall of thorax with penetration into thoracic cavity, sequela
- S21.309Unspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity
- S21.309AUnspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.309DUnspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.309SUnspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity, sequela
- S21.31Laceration without foreign body of front wall of thorax with penetration into thoracic cavity
- S21.311Laceration without foreign body of right front wall of thorax with penetration into thoracic cavity
- S21.311ALaceration without foreign body of right front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.311DLaceration without foreign body of right front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.311SLaceration without foreign body of right front wall of thorax with penetration into thoracic cavity, sequela
- S21.312Laceration without foreign body of left front wall of thorax with penetration into thoracic cavity
- S21.312ALaceration without foreign body of left front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.312DLaceration without foreign body of left front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.312SLaceration without foreign body of left front wall of thorax with penetration into thoracic cavity, sequela
- S21.319Laceration without foreign body of unspecified front wall of thorax with penetration into thoracic cavity
- S21.319ALaceration without foreign body of unspecified front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.319DLaceration without foreign body of unspecified front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.319SLaceration without foreign body of unspecified front wall of thorax with penetration into thoracic cavity, sequela
- S21.32Laceration with foreign body of front wall of thorax with penetration into thoracic cavity
- S21.321Laceration with foreign body of right front wall of thorax with penetration into thoracic cavity
- S21.321ALaceration with foreign body of right front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.321DLaceration with foreign body of right front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.321SLaceration with foreign body of right front wall of thorax with penetration into thoracic cavity, sequela
- S21.322Laceration with foreign body of left front wall of thorax with penetration into thoracic cavity
- S21.322ALaceration with foreign body of left front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.322DLaceration with foreign body of left front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.322SLaceration with foreign body of left front wall of thorax with penetration into thoracic cavity, sequela
- S21.329Laceration with foreign body of unspecified front wall of thorax with penetration into thoracic cavity
- S21.329ALaceration with foreign body of unspecified front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.329DLaceration with foreign body of unspecified front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.329SLaceration with foreign body of unspecified front wall of thorax with penetration into thoracic cavity, sequela
- S21.33Puncture wound without foreign body of front wall of thorax with penetration into thoracic cavity
- S21.331Puncture wound without foreign body of right front wall of thorax with penetration into thoracic cavity
- S21.331APuncture wound without foreign body of right front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.331DPuncture wound without foreign body of right front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.331SPuncture wound without foreign body of right front wall of thorax with penetration into thoracic cavity, sequela
- S21.332Puncture wound without foreign body of left front wall of thorax with penetration into thoracic cavity
- S21.332APuncture wound without foreign body of left front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.332DPuncture wound without foreign body of left front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.332SPuncture wound without foreign body of left front wall of thorax with penetration into thoracic cavity, sequela
- S21.339Puncture wound without foreign body of unspecified front wall of thorax with penetration into thoracic cavity
- S21.339APuncture wound without foreign body of unspecified front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.339DPuncture wound without foreign body of unspecified front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.339SPuncture wound without foreign body of unspecified front wall of thorax with penetration into thoracic cavity, sequela
- S21.34Puncture wound with foreign body of front wall of thorax with penetration into thoracic cavity
- S21.341Puncture wound with foreign body of right front wall of thorax with penetration into thoracic cavity
- S21.341APuncture wound with foreign body of right front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.341DPuncture wound with foreign body of right front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.341SPuncture wound with foreign body of right front wall of thorax with penetration into thoracic cavity, sequela
- S21.342Puncture wound with foreign body of left front wall of thorax with penetration into thoracic cavity
- S21.342APuncture wound with foreign body of left front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.342DPuncture wound with foreign body of left front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.342SPuncture wound with foreign body of left front wall of thorax with penetration into thoracic cavity, sequela
- S21.349Puncture wound with foreign body of unspecified front wall of thorax with penetration into thoracic cavity
- S21.349APuncture wound with foreign body of unspecified front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.349DPuncture wound with foreign body of unspecified front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.349SPuncture wound with foreign body of unspecified front wall of thorax with penetration into thoracic cavity, sequela
- S21.35Open bite of front wall of thorax with penetration into thoracic cavity
- S21.351Open bite of right front wall of thorax with penetration into thoracic cavity
- S21.351AOpen bite of right front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.351DOpen bite of right front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.351SOpen bite of right front wall of thorax with penetration into thoracic cavity, sequela
- S21.352Open bite of left front wall of thorax with penetration into thoracic cavity
- S21.352AOpen bite of left front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.352DOpen bite of left front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.352SOpen bite of left front wall of thorax with penetration into thoracic cavity, sequela
- S21.359Open bite of unspecified front wall of thorax with penetration into thoracic cavity
- S21.359AOpen bite of unspecified front wall of thorax with penetration into thoracic cavity, initial encounter
- S21.359DOpen bite of unspecified front wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.359SOpen bite of unspecified front wall of thorax with penetration into thoracic cavity, sequela
- S21.4Open wound of back wall of thorax with penetration into thoracic cavity
- S21.40Unspecified open wound of back wall of thorax with penetration into thoracic cavity
- S21.401Unspecified open wound of right back wall of thorax with penetration into thoracic cavity
- S21.401AUnspecified open wound of right back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.401DUnspecified open wound of right back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.401SUnspecified open wound of right back wall of thorax with penetration into thoracic cavity, sequela
- S21.402Unspecified open wound of left back wall of thorax with penetration into thoracic cavity
- S21.402AUnspecified open wound of left back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.402DUnspecified open wound of left back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.402SUnspecified open wound of left back wall of thorax with penetration into thoracic cavity, sequela
- S21.409Unspecified open wound of unspecified back wall of thorax with penetration into thoracic cavity
- S21.409AUnspecified open wound of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.409DUnspecified open wound of unspecified back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.409SUnspecified open wound of unspecified back wall of thorax with penetration into thoracic cavity, sequela
- S21.41Laceration without foreign body of back wall of thorax with penetration into thoracic cavity
- S21.411Laceration without foreign body of right back wall of thorax with penetration into thoracic cavity
- S21.411ALaceration without foreign body of right back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.411DLaceration without foreign body of right back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.411SLaceration without foreign body of right back wall of thorax with penetration into thoracic cavity, sequela
- S21.412Laceration without foreign body of left back wall of thorax with penetration into thoracic cavity
- S21.412ALaceration without foreign body of left back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.412DLaceration without foreign body of left back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.412SLaceration without foreign body of left back wall of thorax with penetration into thoracic cavity, sequela
- S21.419Laceration without foreign body of unspecified back wall of thorax with penetration into thoracic cavity
- S21.419ALaceration without foreign body of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.419DLaceration without foreign body of unspecified back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.419SLaceration without foreign body of unspecified back wall of thorax with penetration into thoracic cavity, sequela
- S21.42Laceration with foreign body of back wall of thorax with penetration into thoracic cavity
- S21.421Laceration with foreign body of right back wall of thorax with penetration into thoracic cavity
- S21.421ALaceration with foreign body of right back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.421DLaceration with foreign body of right back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.421SLaceration with foreign body of right back wall of thorax with penetration into thoracic cavity, sequela
- S21.422Laceration with foreign body of left back wall of thorax with penetration into thoracic cavity
- S21.422ALaceration with foreign body of left back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.422DLaceration with foreign body of left back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.422SLaceration with foreign body of left back wall of thorax with penetration into thoracic cavity, sequela
- S21.429Laceration with foreign body of unspecified back wall of thorax with penetration into thoracic cavity
- S21.429ALaceration with foreign body of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.429DLaceration with foreign body of unspecified back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.429SLaceration with foreign body of unspecified back wall of thorax with penetration into thoracic cavity, sequela
- S21.43Puncture wound without foreign body of back wall of thorax with penetration into thoracic cavity
- S21.431Puncture wound without foreign body of right back wall of thorax with penetration into thoracic cavity
- S21.431APuncture wound without foreign body of right back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.431DPuncture wound without foreign body of right back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.431SPuncture wound without foreign body of right back wall of thorax with penetration into thoracic cavity, sequela
- S21.432Puncture wound without foreign body of left back wall of thorax with penetration into thoracic cavity
- S21.432APuncture wound without foreign body of left back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.432DPuncture wound without foreign body of left back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.432SPuncture wound without foreign body of left back wall of thorax with penetration into thoracic cavity, sequela
- S21.439Puncture wound without foreign body of unspecified back wall of thorax with penetration into thoracic cavity
- S21.439APuncture wound without foreign body of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.439DPuncture wound without foreign body of unspecified back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.439SPuncture wound without foreign body of unspecified back wall of thorax with penetration into thoracic cavity, sequela
- S21.44Puncture wound with foreign body of back wall of thorax with penetration into thoracic cavity
- S21.441Puncture wound with foreign body of right back wall of thorax with penetration into thoracic cavity
- S21.441APuncture wound with foreign body of right back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.441DPuncture wound with foreign body of right back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.441SPuncture wound with foreign body of right back wall of thorax with penetration into thoracic cavity, sequela
- S21.442Puncture wound with foreign body of left back wall of thorax with penetration into thoracic cavity
- S21.442APuncture wound with foreign body of left back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.442DPuncture wound with foreign body of left back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.442SPuncture wound with foreign body of left back wall of thorax with penetration into thoracic cavity, sequela
- S21.449Puncture wound with foreign body of unspecified back wall of thorax with penetration into thoracic cavity
- S21.449APuncture wound with foreign body of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.449DPuncture wound with foreign body of unspecified back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.449SPuncture wound with foreign body of unspecified back wall of thorax with penetration into thoracic cavity, sequela
- S21.45Open bite of back wall of thorax with penetration into thoracic cavity
- S21.451Open bite of right back wall of thorax with penetration into thoracic cavity
- S21.451AOpen bite of right back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.451DOpen bite of right back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.451SOpen bite of right back wall of thorax with penetration into thoracic cavity, sequela
- S21.452Open bite of left back wall of thorax with penetration into thoracic cavity
- S21.452AOpen bite of left back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.452DOpen bite of left back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.452SOpen bite of left back wall of thorax with penetration into thoracic cavity, sequela
- S21.459Open bite of unspecified back wall of thorax with penetration into thoracic cavity
- S21.459AOpen bite of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter
- S21.459DOpen bite of unspecified back wall of thorax with penetration into thoracic cavity, subsequent encounter
- S21.459SOpen bite of unspecified back wall of thorax with penetration into thoracic cavity, sequela
- S21.9Open wound of unspecified part of thorax
- S21.90Unspecified open wound of unspecified part of thorax
- S21.90XAUnspecified open wound of unspecified part of thorax, initial encounter
- S21.90XDUnspecified open wound of unspecified part of thorax, subsequent encounter
- S21.90XSUnspecified open wound of unspecified part of thorax, sequela
- S21.91Laceration without foreign body of unspecified part of thorax
- S21.91XALaceration without foreign body of unspecified part of thorax, initial encounter
- S21.91XDLaceration without foreign body of unspecified part of thorax, subsequent encounter
- S21.91XSLaceration without foreign body of unspecified part of thorax, sequela
- S21.92Laceration with foreign body of unspecified part of thorax
- S21.92XALaceration with foreign body of unspecified part of thorax, initial encounter
- S21.92XDLaceration with foreign body of unspecified part of thorax, subsequent encounter
- S21.92XSLaceration with foreign body of unspecified part of thorax, sequela
- S21.93Puncture wound without foreign body of unspecified part of thorax
- S21.93XAPuncture wound without foreign body of unspecified part of thorax, initial encounter
- S21.93XDPuncture wound without foreign body of unspecified part of thorax, subsequent encounter
- S21.93XSPuncture wound without foreign body of unspecified part of thorax, sequela
- S21.94Puncture wound with foreign body of unspecified part of thorax
- S21.94XAPuncture wound with foreign body of unspecified part of thorax, initial encounter
- S21.94XDPuncture wound with foreign body of unspecified part of thorax, subsequent encounter
- S21.94XSPuncture wound with foreign body of unspecified part of thorax, sequela
- S21.95Open bite of unspecified part of thorax
- S21.95XAOpen bite of unspecified part of thorax, initial encounter
- S21.95XDOpen bite of unspecified part of thorax, subsequent encounter
- S21.95XSOpen bite of unspecified part of thorax, sequela
S21 MS-DRGs
As the principal diagnosis, the billable codes under S21 group to these 9 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 604 Trauma to the Skin, Subcutaneous Tissue and Breast with MCC (148 of 288 codes)
- DRG 605 Trauma to the Skin, Subcutaneous Tissue and Breast without MCC (148 of 288 codes)
- DRG 949 Aftercare with CC/MCC (96 of 288 codes)
- DRG 950 Aftercare without CC/MCC (96 of 288 codes)
- DRG 963 Other Multiple Significant Trauma with MCC (96 of 288 codes)
- DRG 964 Other Multiple Significant Trauma with CC (96 of 288 codes)
- DRG 965 Other Multiple Significant Trauma without CC/MCC (96 of 288 codes)
- DRG 913 Traumatic Injury with MCC (44 of 288 codes)
- DRG 914 Traumatic Injury without MCC (44 of 288 codes)
Other codes that refer to S21
Notes on these codes point to S21.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Chest Injuries and Disorders
The chest is the part of your body between your neck and your abdomen (belly). The medical term for your chest is thorax. Your chest holds many important structures for breathing, digestion, blood circulation, and other important body functions. These structures include your:
Read more about chest injuries and disorders on MedlinePlusWounds and Injuries
An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening. Injuries can happen at work or play, indoors or outdoors, driving a car, or walking across the street.
Read more about wounds and injuries on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.