ICD-10-CM 2027
ICD-10 code for lung contusion
From the official ICD-10-CM alphabetic index entry “Contusion (skin surface intact) › lung”. Page updated September 29, 2026.
About coding lung contusion
The ICD-10-CM code for lung contusion is S27.329 (Contusion of lung, unspecified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on S27.329.
Within S27.32, choose S27.329 (unspecified) only when documentation doesn't support a more specific option: unilateral (S27.321) and bilateral (S27.322).
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.
More specific lung contusion codes (official index)
Common questions about lung contusion ICD-10 codes
What is the ICD-10 code for lung contusion?
- S27.329 — Contusion of lung, unspecified (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: S27.322, S27.321.
What is the ICD-10 code for bilateral lung contusion?
- S27.322 — Contusion of lung, bilateral (header code; choose a more specific subcode).
What is the ICD-10 code for unilateral lung contusion?
- S27.321 — Contusion of lung, unilateral (header code; choose a more specific subcode).
Is S27.329 billable?
- No. S27.329 is a header code. Report one of its more specific subcodes instead.