T21 — Burn and corrosion of trunk

Not billable

Is T21 billable?

No — T21 is a non-billable header code. T21 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath T21.

Billable codes under this header

T21 at a glance

Code	T21
Description	Burn and corrosion of trunk
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Excludes2 — not included here

The conditions below are not part of T21, but a patient may have both at the same time. When documentation supports it, T21 and the excluded code may both be reported.

burns and corrosion of axilla (T22.- with fifth character 4)
burns and corrosion of scapular region (T22.- with fifth character 6)
burns and corrosion of shoulder (T22.- with fifth character 5)

Includes

Conditions classified to T21.

burns and corrosion of hip region

Use additional code — inherited from Chapter 19

Report an additional code alongside T21 to fully describe the condition. T21 is sequenced first.

code to identify any retained foreign body, if applicable (Z18.-)

Use additional code — inherited from T20-T25

Report an additional code alongside T21 to fully describe the condition. T21 is sequenced first.

code from category T31 or T32 to identify extent of body surface involved

Excludes2 — not included here — inherited from Chapter 19

The conditions below are not part of T21, but a patient may have both at the same time. When documentation supports it, T21 and the excluded code may both be reported.

birth trauma (P10-P15)
obstetric trauma (O70-O71)

What codes fall under T21? (8)

How long has T21 existed?

T21 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.