ICD-10 Code C57.0 – Malignant neoplasm of fallopian tube (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C57.0 – Malignant neoplasm of fallopian tube
What it is
C57.0 identifies a malignant tumor arising in the fallopian tube. Use it when the record documents primary cancer of that anatomic site.
Clinical signs
Clinical features vary; refer to documentation. Patients may present with pelvic pain, abnormal vaginal bleeding, or a pelvic mass, but these findings are not specific.
When to use this code
Use C57.0 when the provider documents primary malignancy of the fallopian tube, including confirmed cancer in that location. Code it from pathology, operative, or oncology documentation when the site is clearly stated. If the record only says “pelvic mass” or “female reproductive cancer,” check documentation before assigning this code.
Do not use for
Do not use this code for benign fallopian tube disease, uncertain lesions, or metastasis to the tube from another primary site. Check documentation when the primary site is unclear.
Coding tip
Verify that the fallopian tube is the primary site before coding C57.0.