ICD-10-CM 2027
ICD-10 code for thorax wall contusion
From the official ICD-10-CM alphabetic index entry “Contusion (skin surface intact) › thorax (wall)”. Page updated September 29, 2026.
About coding thorax wall contusion
The ICD-10-CM code for thorax wall contusion is S20.20 (Contusion of thorax, 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 S20.20.
Within S20.2, choose S20.20 (unspecified) only when documentation doesn't support a more specific option: front wall of thorax (S20.21) and back wall of thorax (S20.22).
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 thorax wall contusion codes (official index)
Common questions about thorax wall contusion ICD-10 codes
What is the ICD-10 code for thorax wall contusion?
- S20.20 — Contusion of thorax, unspecified (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: S20.22, S20.21.
What is the ICD-10 code for back thorax wall contusion?
- S20.22 — Contusion of back wall of thorax (header code; choose a more specific subcode).
What is the ICD-10 code for front thorax wall contusion?
- S20.21 — Contusion of front wall of thorax (header code; choose a more specific subcode).
Is S20.20 billable?
- No. S20.20 is a header code. Report one of its more specific subcodes instead.