C51Header code — not billable

Malignant neoplasm of vulva

Chapter
2. Neoplasms
Category
C51
Effective date
October 1, 2026

Related codes in category C51

C51.0Malignant neoplasm of labium majusYesC51.1Malignant neoplasm of labium minusYesC51.2Malignant neoplasm of clitorisYesC51.8Malignant neoplasm of overlapping sites of vulvaYesC51.9Malignant neoplasm of vulva, unspecifiedYes

Frequently asked questions

What is ICD-10 code C51?

C51 is an ICD-10-CM diagnosis code for Malignant neoplasm of vulva.

Is C51 a billable code?

No. C51 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is C51 in?

C51 falls under Chapter 2: Neoplasms.

When did C51 become effective?

C51 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to C51?

C51 belongs to category C51, which includes 5 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.