ICD-10-CM 2027 diagnosis code

S29.021Laceration of muscle and tendon of front wall of thorax

Not billable — use a more specific codeRequires 7th character

S29.021 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.

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 S29.021

S29.021 is the ICD-10-CM diagnosis code for laceration of muscle and tendon of front wall of thorax. It belongs to category S29 (other and unspecified injuries of thorax), 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 3 subcodes must be used instead.

Within S29.02 (laceration of muscle and tendon of thorax), S29.021 is specifically for laceration of muscle and tendon of front wall of thorax. Related codes cover back wall of thorax (S29.022) and unspecified wall of thorax (S29.029).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

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

7th character

The appropriate 7th character is to be added to each code from category S29

Ainitial encounterS29.021A
Dsubsequent encounterS29.021D
SsequelaS29.021S

Notes that apply from higher levels

Instructions written at a parent level also apply to S29.021.

› From S29 Other and unspecified injuries of thorax

Code also

any associated open wound (S21.-)

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

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to S29.021.

Injury › muscle (and fascia) (and tendon) › thorax (level) › laceration › front wall

Code history

2016
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2021
2022
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2024
2025
2026
2027

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

Common questions about S29.021

Is S29.021 billable?: No. S29.021 is a header code. Report one of its more specific subcodes instead.