ICD-10 Code C51.2 – Malignant neoplasm of clitoris (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C51.2 – Malignant neoplasm of clitoris
What it is
C51.2 identifies a malignant tumor arising in the clitoris. Use this code when the documentation states primary cancer of the clitoris, not a benign lesion or a cancer that has spread there from another site.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include a visible or palpable clitoral mass, ulceration, bleeding, pain, or local irritation, with diagnosis confirmed by pathology or specialist assessment.
When to use this code
Use C51.2 when the provider documents primary malignant neoplasm of the clitoris, including biopsy-confirmed cancer or a clearly stated clinical diagnosis. It is appropriate for initial diagnosis, follow-up encounters, and problem-list coding when the malignancy remains active.
If the record only says “vulvar cancer” without a specific site, check documentation before assigning this code. Code the exact anatomic site whenever the clitoris is identified.
Do not use for
Do not use C51.2 for benign clitoral lesions, dysplasia, or non-clitoral vulvar cancers. Check documentation if the lesion is metastatic or if the site is described elsewhere in the vulva.
Coding tip
Verify the anatomic site in the pathology report or operative note before coding, because vulvar cancers are site-specific and C51.2 applies only to the clitoris.