Is ICD-10-CM code S23 billable?

No, S23 (Dislocation and sprain of joints and ligaments of thorax) 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 S23 belong to?

S23 belongs to Chapter 19 of the ICD-10-CM tabular list: S00–T88 (Injury, Poisoning and Certain Other Consequences of External Causes).

S23Not billable, use a more specific code below

Dislocation and sprain of joints and ligaments of thorax

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

108 billable codes under S23: none are a CC or MCC; none map to an HCC.

Instructional notes

Includes: conditions that are coded here

avulsion of joint or ligament of thorax
laceration of cartilage, joint or ligament of thorax
sprain of cartilage, joint or ligament of thorax
traumatic hemarthrosis of joint or ligament of thorax
traumatic rupture of joint or ligament of thorax
traumatic subluxation of joint or ligament of thorax
traumatic tear of joint or ligament of thorax

Excludes2: not included here, code separately if applicable

dislocation, sprain of sternoclavicular joint (S43.2, S43.6)
strain of muscle or tendon of thorax (S29.01-)

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

any associated open wound

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

These notes sit on S20-S29 and apply to every code under it, including S23.

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 S23

S23 can't be used on a claim. Pick a billable code below; grey headings group them.

S23 MS-DRGs

As the principal diagnosis, the billable codes under S23 group to these 11 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 562 Fracture, Sprain, Strain and Dislocation Except Femur, Hip, Pelvis and Thigh with MCC (36 of 108 codes)
DRG 563 Fracture, Sprain, Strain and Dislocation Except Femur, Hip, Pelvis and Thigh without MCC (36 of 108 codes)
DRG 949 Aftercare with CC/MCC (36 of 108 codes)
DRG 950 Aftercare without CC/MCC (36 of 108 codes)
DRG 963 Other Multiple Significant Trauma with MCC (36 of 108 codes)
DRG 964 Other Multiple Significant Trauma with CC (36 of 108 codes)
DRG 965 Other Multiple Significant Trauma without CC/MCC (36 of 108 codes)
DRG 551 Medical Back Problems with MCC (32 of 108 codes)
DRG 552 Medical Back Problems without MCC (32 of 108 codes)
DRG 205 Other Respiratory System Diagnoses with MCC (4 of 108 codes)
DRG 206 Other Respiratory System Diagnoses without MCC (4 of 108 codes)

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.