C14Malignant neoplasm of other and ill-defined sites in the lip, oral cavity and pharynx

C14 is the ICD-10-CM diagnosis code for malignant neoplasm of other and ill-defined sites in the lip, oral cavity and pharynx. It belongs to block C00-C14 (malignant neoplasms of lip, oral cavity and pharynx) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: C14.0 (unspecified), C14.2 (ring) and C14.8 (pharynx).

Don't report C14 together with the conditions in its Excludes1 note: malignant neoplasm of oral cavity NOS (C06.9).

Use an additional code to identify: alcohol abuse and dependence (F10.-), exposure to environmental tobacco smoke (Z77.22), exposure to tobacco smoke in the perinatal period (P96.81), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31) and 2 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.