L55.1 — Sunburn of second degree
L55.1 is a billable, specific ICD-10-CM code for sunburn of second degree. It is valid for submission on a claim.
Other codes that can never be billed with L55.1
These codes carry an Excludes1 note pointing at L55.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading L55.1 alone.
Risk adjustment
L55.1 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.
How L55.1 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 L55.1.
- Sunburn›second degree
Code history
L55.1 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share L55. If L55.1 is not quite right, the correct code is usually one of these.
Questions about L55.1
- Is L55.1 a billable ICD-10-CM code?
- Yes. L55.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does L55.1 sit in the tabular list?
- Diseases of the skin and subcutaneous tissue (L00-L99), in the block Radiation-related disorders of the skin and subcutaneous tissue (L55-L59).