MCMCB Pro
C43.122

C43.122Malignant melanoma of left lower eyelid, including canthus

Billable / specific codeICD-10-CMleft

C43.122 is a billable, specific ICD-10-CM code for malignant melanoma of left lower eyelid, including canthus. It is valid for submission on a claim.

Risk adjustment

C43.122 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 23 Prostate, Breast, and Other Cancers and Tumors0.186 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

C43.122 is named in 85 Medicare coverage policies 85 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A52450Billing and Coding: Paclitaxel (e.g., Taxol®/Abraxane ™)
  • A52450Billing and Coding: Paclitaxel (e.g., Taxol®/Abraxane ™)
  • A52479Oral Anticancer Drugs - Policy Article
  • A52479Oral Anticancer Drugs - Policy Article

Related codes at this level

Codes that share C43.12. If C43.122 is not quite right, the correct code is usually one of these.

Questions about C43.122

Is C43.122 a billable ICD-10-CM code?
Yes. C43.122 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C43.122 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.