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ICD-10-CM 2027

ICD-10 code for chest wall burn

T21.01

Burn of unspecified degree of chest wall

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal) › chest wall”. Page updated September 29, 2026.

About coding chest wall burn

The ICD-10-CM code for chest wall burn is T21.01 (Burn of unspecified degree of chest wall). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T21.01.

Within T21.0 (burn of unspecified degree of trunk), T21.01 is specifically for burn of unspecified degree of chest wall. Related codes cover unspecified site (T21.00), abdominal wall (T21.02), upper back (T21.03), lower back (T21.04), buttock (T21.05), male genital region (T21.06), female genital region (T21.07) and other site of trunk (T21.09).

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 chest wall burn codes (official index)

  • first degree T21.11 — Burn of first degree of chest wall
  • second degree T21.21 — Burn of second degree of chest wall
  • third degree T21.31 — Burn of third degree of chest wall

Common questions about chest wall burn ICD-10 codes

What is the ICD-10 code for chest wall burn?

T21.01 — Burn of unspecified degree of chest wall (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T21.11, T21.21, T21.31.

What is the ICD-10 code for first degree chest wall burn?

T21.11 — Burn of first degree of chest wall (header code; choose a more specific subcode).

What is the ICD-10 code for second degree chest wall burn?

T21.21 — Burn of second degree of chest wall (header code; choose a more specific subcode).

What is the ICD-10 code for third degree chest wall burn?

T21.31 — Burn of third degree of chest wall (header code; choose a more specific subcode).

Is T21.01 billable?

No. T21.01 is a header code. Report one of its more specific subcodes instead.