Malignant neoplasm of hypopharynx, unspecified

This code signifies a cancerous tumor originating in the hypopharynx, the lowest part of the pharynx, where the exact subsite of the malignancy has not been specified by the clinician. It indicates a primary malignant neoplasm without further anatomical detail regarding its location within the hypopharynx.

This code is appropriate when documentation confirms a primary malignant neoplasm of the hypopharynx, but the specific subsite (e.g., postcricoid region, piriform sinus, posterior pharyngeal wall) is not documented. It should be used when the physician's diagnosis is simply "malignant neoplasm of hypopharynx" without further specificity.

• Always seek clarification from the provider if a more specific subsite of the hypopharynx can be identified, as more precise codes exist (C13.0-C13.2).
• Do not use this code if the malignancy is secondary or metastatic; use appropriate secondary neoplasm codes.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, unless another code better describes the primary reason for the visit.