Malignant neoplasm of other specified sites of hypopharynx

This code signifies a cancerous tumor originating in a specific, less common anatomical location within the hypopharynx, excluding sites like the postcricoid region, piriform sinus, or posterior wall. It indicates a primary malignant growth in an "other specified" part of this lower pharyngeal area.

Use this code when the physician's documentation clearly identifies a primary malignant neoplasm of the hypopharynx, and the specific subsite is mentioned but does not fall into the more common categories (e.g., "malignant neoplasm of the lateral wall of the hypopharynx"). Documentation should specify the exact location within the hypopharynx that isn't covered by more specific codes.

• Ensure the documentation specifies a primary malignant neoplasm; do not use for secondary or metastatic disease.
• Verify the exact subsite of the hypopharynx. If a more specific code (e.g., piriform sinus, postcricoid region) is available, use that instead.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition is clearly the primary reason for treatment.