T21.45

T21.45: Corrosion of unspecified degree of buttock

Non-billable headerICD-10-CM

T21.45 is a non-billable header ICD-10-CM code for corrosion of unspecified degree of buttock. 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

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Corrosion of unspecified degree of anus

Excludes2 inherited from the categories above T21.45

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›buttock(s)

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead T21.45

3 child codes. Green means billable.