ICD-10 Code C57.12 – Malignant neoplasm of left broad ligament (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C57.12 – Malignant neoplasm of left broad ligament
What it is
C57.12 identifies a malignant tumor arising in the left broad ligament, a supporting structure of the female pelvis. Use it when documentation clearly states primary cancer of the left broad ligament.
Clinical signs
Clinical features vary; refer to documentation. Patients may have a pelvic mass, pain, or nonspecific gynecologic symptoms, but diagnosis is based on pathology or a clinician’s confirmed malignant neoplasm statement.
When to use this code
Use C57.12 when the record specifically names malignant neoplasm of the left broad ligament. It is appropriate for confirmed primary cancer at that site, including surgical, oncology, or pathology documentation. Check documentation if laterality or primary site is unclear.
Do not use for
Do not use this code for benign broad ligament masses, uncertain behavior, or metastatic disease to the broad ligament. If the note does not specify the left side, do not assume laterality.
Coding tip
Verify the exact anatomic site and laterality in the operative note, pathology report, or provider assessment before assigning C57.12.