ICD-10-CM 2027
ICD-10 code for back lower burn
From the official ICD-10-CM alphabetic index entry “Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal) › back (lower)”. Page updated September 29, 2026.
About coding back lower burn
The ICD-10-CM code for back lower burn is T21.04 (Burn of unspecified degree of lower back). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T21.04.
Within T21.0 (burn of unspecified degree of trunk), T21.04 is specifically for burn of unspecified degree of lower back. Related codes cover unspecified site (T21.00), chest wall (T21.01), abdominal wall (T21.02), upper back (T21.03), 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 back lower burn codes (official index)
- first degree T21.14 — Burn of first degree of lower back
- second degree T21.24 — Burn of second degree of lower back
- third degree T21.34 — Burn of third degree of lower back
- upper T21.03 — Burn of unspecified degree of upper back
- first degree T21.13 — Burn of first degree of upper back
- second degree T21.23 — Burn of second degree of upper back
- third degree T21.33 — Burn of third degree of upper back
Common questions about back lower burn ICD-10 codes
What is the ICD-10 code for back lower burn?
- T21.04 — Burn of unspecified degree of lower back (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T21.14, T21.24, T21.34, T21.03 and others below.
What is the ICD-10 code for first degree back lower burn?
- T21.14 — Burn of first degree of lower back (header code; choose a more specific subcode).
What is the ICD-10 code for second degree back lower burn?
- T21.24 — Burn of second degree of lower back (header code; choose a more specific subcode).
What is the ICD-10 code for third degree back lower burn?
- T21.34 — Burn of third degree of lower back (header code; choose a more specific subcode).
What is the ICD-10 code for upper back lower burn?
- T21.03 — Burn of unspecified degree of upper back (header code; choose a more specific subcode).
Is T21.04 billable?
- No. T21.04 is a header code. Report one of its more specific subcodes instead.