T21.73XA
T21.73XA: Corrosion of third degree of upper back, initial encounter
Billable / specific codeICD-10-CM
T21.73XA is a billable, specific ICD-10-CM code for corrosion of third degree of upper back, initial encounter. It is valid for submission on a claim.
Check T21.73XA with the rest of the claim: free scrubber7th character "A": initial encounter
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 third degree of interscapular region
Excludes2 inherited from the categories above T21.73XA
Not part of this code, but both may be coded when both are present.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
T21.73XA is named in 10 Medicare coverage policies: 10 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A52438Billing and Coding: Tetanus Immunization
- A53058Billing and Coding: Home Health Physical Therapy
- A53065Billing and Coding: Outpatient Physical Therapy
- A56900Billing and Coding: Immunizations
Code history
Unchanged in every release from FY2024 to FY2027.