ICD-10 Code C79.63 – Secondary malignant neoplasm of bilateral ovaries (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C79.63 – Secondary malignant neoplasm of bilateral ovaries
What it is
C79.63 identifies metastatic cancer involving both ovaries. You use it when a malignancy from another primary site has spread to the right and left ovary.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include pelvic mass, abdominal pain, bloating, or imaging evidence of bilateral ovarian involvement, but the primary cancer site must be documented.
When to use this code
Use this code when the record clearly states secondary malignant neoplasm affecting both ovaries, whether found on imaging, pathology, or operative documentation. It is appropriate when the ovarian disease is metastatic and bilateral, not primary ovarian cancer. If laterality is unclear, check documentation.
Do not use for
Do not use C79.63 for primary ovarian malignancy or for metastasis to only one ovary. If the chart does not confirm bilateral involvement, use the more specific documented code or check documentation.
Coding tip
Always code the primary cancer first when documented, and confirm that both ovaries are involved before assigning C79.63.