NPI Atlas

C51 – Malignant neoplasm of vulva

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of female genital organs

Non-billable header

ICD-10-CM code C51

Code: C51 (claims format: C51)
Description: Malignant neoplasm of vulva
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 2. Neoplasms (C00-D49)
Block: C51-C58 Malignant neoplasms of female genital organs

Billable codes under C51

C51 is a header code and cannot be used on claims. Choose the most specific code:

C51.0 – Malignant neoplasm of labium majusBillable
C51.1 – Malignant neoplasm of labium minusBillable
C51.2 – Malignant neoplasm of clitorisBillable
C51.8 – Malignant neoplasm of overlapping sites of vulvaBillable
C51.9 – Malignant neoplasm of vulva, unspecifiedBillable

Notes for C51

Excludes1 (not coded here):

carcinoma in situ of vulva (D07.1)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block C51-C58

Includes:

malignant neoplasm of skin of female genital organs

Frequently asked questions

What is ICD-10 code C51?

C51 is the ICD-10-CM code for malignant neoplasm of vulva, in the block C51-C58 (Malignant neoplasms of female genital organs).

Is C51 a billable code?

No. C51 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.