ICD-10 Code C56.2 – Malignant neoplasm of left ovary (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C56.2 – Malignant neoplasm of left ovary
What it is
C56.2 identifies a malignant tumor arising in the left ovary. Use it when documentation clearly states primary cancer of the left ovary.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include a pelvic or adnexal mass, abdominal bloating, pain, or imaging evidence of an ovarian malignancy.
When to use this code
Use C56.2 when the provider documents a primary malignant neoplasm of the left ovary. It also applies when pathology, imaging, or operative notes confirm the left ovary as the primary site. If laterality is not specified, check the record before coding.
Do not use for
Do not use this code for benign ovarian cysts, borderline tumors, or metastatic disease to the ovary. If the documentation does not confirm a left-sided primary malignancy, check documentation.
Coding tip
Verify laterality in pathology, operative, or oncology notes before assigning C56.2.