ICD-10 Code C57.1 – Malignant neoplasm of broad ligament (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C57.1 – Malignant neoplasm of broad ligament
What it is
C57.1 identifies a malignant tumor arising in the broad ligament, a supporting structure of the female pelvis. Use it when the documentation clearly states primary cancer of the broad ligament.
Clinical signs
Clinical features vary; refer to documentation. Patients may have a pelvic mass, pain, bloating, or abnormal pelvic findings, but the diagnosis depends on pathology or clear clinician documentation.
When to use this code
Use C57.1 when the provider documents primary malignancy of the broad ligament, including confirmed cancer of that site. Code it from pathology, operative, or oncology notes that identify the broad ligament as the origin. If the record only mentions a pelvic mass or an unspecified gynecologic cancer, check documentation before assigning this code.
Do not use for
Do not use this code for benign broad ligament masses, metastatic disease to the broad ligament, or malignancies documented in another female reproductive site. Check documentation when the primary site is uncertain.
Coding tip
Confirm the broad ligament is named as the primary site; if it is only involved by spread, code the primary malignancy instead.