C51.1 — Malignant neoplasm of labium minus
C51.1 is a billable, specific ICD-10-CM code for malignant neoplasm of labium minus. It is valid for submission on a claim.
Risk adjustment
C51.1 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 22 Bladder, Colorectal, and Other Cancers0.363 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
C51.1 is named in 66 Medicare coverage policies — 66 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52370Billing and Coding: Bevacizumab and biosimilars
- A52450Billing and Coding: Paclitaxel (e.g., Taxol®/Abraxane ™)
- A52480Oral Antiemetic Drugs (Replacement for Intravenous Antiemetics) - Policy Article
- A53883Billing and Coding: Mohs Micrographic Surgery (MMS)
How C51.1 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 C51.1.
- Melanoma›skin›labium›minus
Related codes at this level
Codes that share C51. If C51.1 is not quite right, the correct code is usually one of these.
Questions about C51.1
- Is C51.1 a billable ICD-10-CM code?
- Yes. C51.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does C51.1 sit in the tabular list?
- Neoplasms (C00-D49), in the block Malignant neoplasms of female genital organs (C51-C58).