T21.57XS — Corrosion of first degree of female genital region, sequela
T21.57XS is a billable, specific ICD-10-CM code for corrosion of first degree of female genital region, 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
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
- corrosion of vagina (T28.8)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Corrosion of first degree of labium (majus) (minus)
- Corrosion of first degree of perineum
- Corrosion of first degree of vulva
Risk adjustment
T21.57XS 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
T21.57XS is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A59186Billing and Coding: Magnesium
Related codes at this level
Codes that share T21.57. If T21.57XS is not quite right, the correct code is usually one of these.
Questions about T21.57XS
- Is T21.57XS a billable ICD-10-CM code?
- Yes. T21.57XS is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does T21.57XS 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).