ICD-10-CM 2027 diagnosis code

S23Dislocation and sprain of joints and ligaments of thorax

Not billable — use a more specific code

S23 is a header code, so it can't be reported by itself. Choose one of the 7 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S23

S23 is the ICD-10-CM diagnosis code for dislocation and sprain of joints and ligaments of thorax. It belongs to block S20-S29 (injuries to the thorax) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: S23.0 (disc), S23.1 (vertebra), S23.2 (thorax), S23.3 (spine), S23.4 (sternum), S23.8 (thorax) and S23.9 (thorax).

The conditions in its Excludes2 note aren't part of S23, but may be coded alongside it if the patient has both: dislocation, sprain of sternoclavicular joint (S43.2, S43.6) and strain of muscle or tendon of thorax (S29.01-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under S23

Coding notes

IncludesFurther defines the content of the category

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

Excludes2Not included here — may be reported together if both conditions exist

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

Code alsoTwo codes may be needed; sequencing depends on circumstances

any associated open wound

Notes that apply from higher levels

Instructions written at a parent level also apply to S23.

Broader instructions also apply from S20-S29 Injuries to the thorax and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about S23

Is S23 billable?: No. S23 is a header code. Report one of its more specific subcodes instead.