L59.9 — Disorder of the skin and subcutaneous tissue related to radiation, unspecified
L59.9 is a billable, specific ICD-10-CM code for disorder of the skin and subcutaneous tissue related to radiation, unspecified. It is valid for submission on a claim.
Risk adjustment
L59.9 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
L59.9 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A53057Billing and Coding: Home Health Occupational Therapy
- A53058Billing and Coding: Home Health Physical Therapy
- A53064Billing and Coding: Outpatient Occupational Therapy
- A53065Billing and Coding: Outpatient Physical Therapy
How L59.9 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 L59.9.
- Effect, adverse›radiation NOS›skin
Related codes at this level
Codes that share L59. If L59.9 is not quite right, the correct code is usually one of these.
Questions about L59.9
- Is L59.9 a billable ICD-10-CM code?
- Yes. L59.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does L59.9 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).