T23.442
T23.442: Corrosion of unspecified degree of multiple left fingers (nail), including thumb
Non-billable headerICD-10-CMleft
T23.442 is a non-billable header ICD-10-CM code for corrosion of unspecified degree of multiple left fingers (nail), including thumb. 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 T23
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Alphabetic index entries that lead here
- Corrosion›thumb›multiple sites with fingers›left
- Corrosion›finger›multiple sites›with thumb›left
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead T23.442
3 child codes. Green means billable.
- T23.442ACorrosion of unspecified degree of multiple left fingers (nail), including thumb, initial encounter
- T23.442DCorrosion of unspecified degree of multiple left fingers (nail), including thumb, subsequent encounter
- T23.442SCorrosion of unspecified degree of multiple left fingers (nail), including thumb, sequela