Prsnl hx of malig neoplm of site of lip, oral cav, & pharynx

This code indicates a patient's past history of a malignant tumor that originated in a site within the lip, oral cavity, or pharynx, excluding those specifically coded elsewhere (e.g., tongue, tonsil). The patient is no longer undergoing active treatment for the primary malignancy at this site, but the history remains relevant for ongoing care and surveillance.

Use this code when documenting a patient's medical history after successful treatment (e.g., surgery, radiation, chemotherapy) for a primary cancer of the lip, oral cavity, or pharynx, and the patient is now in remission or under surveillance. It is appropriate for follow-up visits where the focus is on monitoring for recurrence or managing long-term effects of treatment.

• Always sequence this code as a secondary diagnosis, following the code for the reason for the encounter.
• Do not use this code if the patient is currently receiving active treatment for the primary malignancy or a recurrence at this site.
• Ensure the specific site of the original neoplasm is not better represented by a more specific Z85.81- subcategory.