Is T21.6 a billable ICD-10-CM code?

No. T21.6 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does T21.6 sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Burns and corrosions of external body surface, specified by site (T20-T25).

T21.6

T21.6 — Corrosion of second degree of trunk

Non-billable headerICD-10-CM

T21.6 is a non-billable header ICD-10-CM code for corrosion of second degree of trunk. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

The appropriate 7th character is to be added to each code from category T21

A: initial encounter
D: subsequent encounter
S: sequela

Code first

The underlying condition must be sequenced before this code.

(T51-T65) to identify chemical and intent

Use additional code

Add a secondary code to capture the detail described below.

external cause code to identify place (Y92)

Risk adjustment

T21.6 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead T21.6

9 child codes. Green means billable.

Related codes at this level

Codes that share T21. If T21.6 is not quite right, the correct code is usually one of these.

Questions about T21.6

Is T21.6 a billable ICD-10-CM code?: No. T21.6 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does T21.6 sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Burns and corrosions of external body surface, specified by site (T20-T25).