Malignant neoplasm of heart

This code signifies a primary cancerous tumor originating within the heart tissue itself. This is a rare and aggressive form of cancer that can affect any part of the heart, including the myocardium, endocardium, and pericardium.

Apply this code when documentation explicitly states a primary malignant neoplasm of the heart. This diagnosis is typically confirmed through biopsy and imaging studies. Do not use for metastatic disease to the heart.

• Differentiate carefully between primary cardiac tumors and metastatic lesions to the heart; this code is only for primary malignancy.
• Ensure documentation specifies "primary" or "originating in" the heart to support this code.
• Consider additional codes for any associated cardiac complications or treatments.