MCMCB Pro
C4A.71

C4A.71Merkel cell carcinoma of right lower limb, including hip

Billable / specific codeICD-10-CMright

C4A.71 is a billable, specific ICD-10-CM code for merkel cell carcinoma of right lower limb, including hip. It is valid for submission on a claim.

Risk adjustment

C4A.71 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 21 Lymphoma and Other Cancers0.671 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

C4A.71 is named in 55 Medicare coverage policies 55 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A52479Oral Anticancer Drugs - Policy Article
  • A52479Oral Anticancer Drugs - Policy Article
  • A52479Oral Anticancer Drugs - Policy Article
  • A52480Oral Antiemetic Drugs (Replacement for Intravenous Antiemetics) - Policy Article

Related codes at this level

Codes that share C4A.7. If C4A.71 is not quite right, the correct code is usually one of these.

Questions about C4A.71

Is C4A.71 a billable ICD-10-CM code?
Yes. C4A.71 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C4A.71 sit in the tabular list?
Neoplasms (C00-D49), in the block Melanoma and other malignant neoplasms of skin (C43-C44).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.