T21.65XS — Corrosion of second degree of buttock, sequela
T21.65XS is a billable, specific ICD-10-CM code for corrosion of second degree of buttock, sequela. It is valid for submission on a claim.
7th character "S" — sequela
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 second degree of anus
Risk adjustment
T21.65XS 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.
Medicare coverage
T21.65XS is named in 7 Medicare coverage policies — 6 listing it as supporting medical necessity, and 1 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56566Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
- A53057Billing and Coding: Home Health Occupational Therapy
- A53058Billing and Coding: Home Health Physical Therapy
- A53064Billing and Coding: Outpatient Occupational Therapy
Related codes at this level
Codes that share T21.65. If T21.65XS is not quite right, the correct code is usually one of these.
Questions about T21.65XS
- Is T21.65XS a billable ICD-10-CM code?
- Yes. T21.65XS is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does T21.65XS 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).