Secondary malignant neoplasm of ovary

This code signifies the presence of a malignant tumor in the ovary that originated from a primary cancer elsewhere in the body and subsequently spread to the ovary. It indicates metastatic disease to the ovary, not a primary ovarian cancer.

Apply this code when documentation clearly states that a malignant neoplasm in the ovary is secondary or metastatic. This typically occurs when a patient has a known primary cancer (e.g., breast, colon, stomach) and imaging or pathology confirms ovarian involvement as a metastasis.

• Always sequence this code after the code for the primary malignant neoplasm.
• Do not use this code for primary ovarian cancer; refer to codes in the 183.0 series for primary ovarian malignancies.
• Ensure documentation explicitly states "metastatic to ovary" or "secondary malignant neoplasm of ovary."