Is ICD-10-CM code S27 billable?

No, S27 (Injury of other and unspecified intrathoracic organs) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code S27 belong to?

S27 belongs to Chapter 19 of the ICD-10-CM tabular list: S00–T88 (Injury, Poisoning and Certain Other Consequences of External Causes).

S27Not billable, use a more specific code below

Injury of other and unspecified intrathoracic organs

In Injuries to the thorax (S20-S29), chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes

162 billable codes under S27: 24 are an MCC, 30 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

Instructional notes

Excludes2: not included here, code separately if applicable

injury of cervical esophagus (S10-S19)
injury of trachea (cervical) (S10-S19)

Code also: add a code for this too, order depends on the encounter

any associated open wound of thorax (S21.-)

Also applies, from Injuries to the thorax (S20-S29)

These notes sit on S20-S29 and apply to every code under it, including S27.

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)

Read Section I.C.19 (page 77)

All codes under S27

S27 can't be used on a claim. Pick a billable code below; grey headings group them.

S27 MS-DRGs

As the principal diagnosis, the billable codes under S27 group to these 20 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 205 Other Respiratory System Diagnoses with MCC (78 of 162 codes)
DRG 206 Other Respiratory System Diagnoses without MCC (78 of 162 codes)
DRG 949 Aftercare with CC/MCC (54 of 162 codes)
DRG 950 Aftercare without CC/MCC (54 of 162 codes)
DRG 963 Other Multiple Significant Trauma with MCC (54 of 162 codes)
DRG 964 Other Multiple Significant Trauma with CC (54 of 162 codes)
DRG 965 Other Multiple Significant Trauma without CC/MCC (54 of 162 codes)
DRG 183 Major Chest Trauma with MCC (22 of 162 codes)
DRG 184 Major Chest Trauma with CC (22 of 162 codes)
DRG 185 Major Chest Trauma without CC/MCC (22 of 162 codes)
DRG 368 Major Esophageal Disorders with MCC (4 of 162 codes)
DRG 369 Major Esophageal Disorders with CC (4 of 162 codes)
DRG 370 Major Esophageal Disorders without CC/MCC (4 of 162 codes)
DRG 199 Pneumothorax with MCC (3 of 162 codes)
DRG 200 Pneumothorax with CC (3 of 162 codes)
DRG 201 Pneumothorax without CC/MCC (3 of 162 codes)
DRG 791 Prematurity with Major Problems (3 of 162 codes)
DRG 793 Full Term Neonate with Major Problems (3 of 162 codes)
DRG 913 Traumatic Injury with MCC (1 of 162 codes)
DRG 914 Traumatic Injury without MCC (1 of 162 codes)

Other codes that refer to S27

Notes on these codes point to S27.

S21 Code Also: injury of intrathoracic organs (S27.-)
S22 Code Also: injury of intrathoracic organ (S27.-)

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:

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.