ICD-10 Code C57.01 – Malignant neoplasm of right fallopian tube (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C57.01 – Malignant neoplasm of right fallopian tube
What it is
This code identifies a malignant tumor arising in the right fallopian tube. Use it when documentation specifies primary cancer of that side, not a metastatic or unspecified pelvic malignancy.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records describe a pelvic mass, abnormal vaginal bleeding, pelvic pain, or findings from imaging, surgery, or pathology confirming malignancy.
When to use this code
Use C57.01 when the provider documents primary cancer of the right fallopian tube, including confirmed pathology or a clear clinical diagnosis. It also fits encounters for evaluation, staging, or follow-up of this documented malignancy. Check documentation if laterality is unclear or if the tumor is described as secondary.
Do not use for
Do not use this code for malignancy of the left fallopian tube, bilateral disease, or unspecified fallopian tube cancer. Also avoid it when the neoplasm is metastatic to the tube rather than primary.
Coding tip
Verify laterality in the operative note, pathology report, or oncology assessment before assigning the code.