Z85.818 ICD-10-CM Code: Personal history of malignant neoplasm of other sites of lip, oral cavity, and pharynx

Z85.818 is the ICD-10-CM diagnosis code for personal history of malignant neoplasm of other sites of lip, oral cavity, and pharynx. A person who previously had cancer of other specific sites in the lip, oral cavity, or pharynx (throat) not already classified elsewhere. This code covers less common mouth and throat cancers. Z85.818 sits in the ICD-10-CM chapter for factors influencing health status and contact with health services (z00-z99), within the section covering persons with potential health hazards related to family and personal history and certain conditions influencing health status (z77-z99).

Z85.818 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

This is a catch-all code for oral and pharyngeal cancers not covered by Z85.810 (tongue) or other specific oral cancer codes.