T21.74

T21.74: Corrosion of third degree of lower back

Non-billable headerICD-10-CM

T21.74 is a non-billable header ICD-10-CM code for corrosion of third degree of lower back. 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

Excludes2 inherited from the categories above T21.74

Not part of this code, but both may be coded when both are present.

Written on T21: Burn and corrosion of trunk

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)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

Corrosion›back›third degree

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead T21.74

3 child codes. Green means billable.