Malignant neoplasm of head, face, and neck

This code signifies the presence of a primary cancerous tumor originating in any part of the head, face, or neck region. This includes malignancies affecting structures such as the scalp, forehead, orbit, ear, nose, lips, oral cavity, pharynx, larynx, salivary glands, and thyroid gland, among others. It represents the initial site of the malignant growth.

Apply this code when documentation clearly indicates a primary malignant neoplasm located within the anatomical boundaries of the head, face, or neck, and a more specific site code is not available or appropriate. This code is often used for ill-defined or overlapping sites within this region, or when the exact subsite is not precisely documented but confirmed to be within the general head/face/neck area.

• Always strive for a more specific anatomical site code (e.g., 140.x for lip, 141.x for tongue) if the documentation allows.
• Do not use this code for secondary (metastatic) neoplasms; use codes from category 196.x or 197.x for those.
• Ensure the documentation explicitly states "malignant neoplasm" or "carcinoma" for the specified region.