Secondary malignant neoplasm of oral cavity

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2027 onwards.

What has happened to this code

Every change the publisher made, from 2027 to now.

FY2027 Added to the code set Secondary malignant neoplasm of oral cavity

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from C79 Secondary malignant neoplasm of other and unspecified sites

Excludes1 - never coded here

secondary carcinoid tumors (C7B.-)
secondary neuroendocrine tumors (C7B.-)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Neoplasm, neoplastic > oral
Neoplasm, neoplastic > oral > mucosa
Neoplasm, neoplastic > oral > ill-defined

Codes in the same group

Code	Description	Status
C79.81	Secondary malignant neoplasm of breast	Valid
C79.82	Secondary malignant neoplasm of genital organs	Valid
C79.89	Secondary malignant neoplasm of other specified sites	Valid