Malignant neoplasm of nasopharynx, unspecified site

This code signifies a cancerous growth originating in the nasopharynx, the upper part of the throat behind the nose. It indicates that the specific subsite within the nasopharynx (e.g., posterior wall, lateral wall) has not been documented or determined.

This code is appropriate when a definitive diagnosis of nasopharyngeal carcinoma is established, but the medical record lacks precise anatomical detail regarding the tumor's origin within the nasopharynx. It should be used when documentation states "nasopharyngeal carcinoma, unspecified" or similar.

• Avoid using this code if a more specific site within the nasopharynx is documented (e.g., posterior wall, lateral wall).
• Always query the provider for greater specificity if possible to avoid using an "unspecified" code.
• Sequence this code as the primary diagnosis when it represents the reason for the encounter or treatment.