L51.1 — Stevens-Johnson syndrome
L51.1 is a billable, specific ICD-10-CM code for stevens-johnson syndrome. It is valid for submission on a claim.
Risk adjustment
L51.1 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
L51.1 is named in 5 Medicare coverage policies — 5 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56786Billing and Coding: Immune Globulin
- A57554Billing and Coding: Immune Globulins
- A57778Billing and Coding: Immune Globulin
- A59105Billing and Coding: Off-Label Use of Intravenous Immune Globulin (IVIG)
How L51.1 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to L51.1.
- Ectodermosis erosiva pluriorificialis
- Stevens-Johnson disease or syndrome
- Syndrome›Stevens-Johnson syndrome
- Erythema, erythematous›multiforme›bullous, bullosum
- Erythema, erythematous›multiforme›conjunctiva
Related codes at this level
Codes that share L51. If L51.1 is not quite right, the correct code is usually one of these.
Questions about L51.1
- Is L51.1 a billable ICD-10-CM code?
- Yes. L51.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does L51.1 sit in the tabular list?
- Diseases of the skin and subcutaneous tissue (L00-L99), in the block Urticaria and erythema (L49-L54).