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ICD-10-CM 2027

ICD-10 code for sternal region injury

S29.9

Unspecified injury of thorax

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Injury › sternal region”. Page updated September 29, 2026.

About coding sternal region injury

The ICD-10-CM code for sternal region injury is S29.9 (Unspecified injury of thorax).

Within S29, choose S29.9 (Unspecified injury of thorax) only when documentation doesn't support a more specific option: injury of muscle and tendon at thorax level (S29.0) and other specified injuries of thorax (S29.8).

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.

Common questions about sternal region injury ICD-10 codes

What is the ICD-10 code for sternal region injury?

S29.9 — Unspecified injury of thorax (a header code; report a more specific subcode).

Is S29.9 billable?

No. S29.9 is a header code. Report one of its more specific subcodes instead.