ICD-10-CM 2027 diagnosis code

S20Superficial injury of thorax

Not billable — use a more specific code

S20 is a header code, so it can't be reported by itself. Choose one of the 6 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 S20

S20 is the ICD-10-CM diagnosis code for superficial injury 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 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: S20.0 (breast), S20.1 (breast), S20.2 (thorax), S20.3 (thorax), S20.4 (thorax) and S20.9 (thorax).

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 S20

Notes that apply from higher levels

Instructions written at a parent level also apply to S20.

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 S20

Is S20 billable?: No. S20 is a header code. Report one of its more specific subcodes instead.