ICD-10 Code C57.8 – Malignant neoplasm of overlapping sites of female genital organs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C57.8 – Malignant neoplasm of overlapping sites of female genital organs
What it is
This code identifies a malignant tumor of female genital organs that spans overlapping anatomic sites and cannot be assigned to one single organ. Use it when the documentation clearly describes overlapping involvement.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include a pelvic mass, abnormal vaginal bleeding, pain, or symptoms related to local tumor spread, but the specific site must be documented.
When to use this code
Use C57.8 when the provider states the cancer involves overlapping sites of female genital organs and a more specific site is not appropriate. It may apply to primary malignancies involving contiguous structures. If the record names a single organ, code that site instead.
Do not use for
Do not use this code for a malignancy confined to one female genital organ or for unspecified genital cancer without overlap. Check documentation if the primary site, laterality, or extent is unclear.
Coding tip
Verify the exact anatomic wording in the pathology or oncology note before assigning C57.8.