C11Malignant neoplasm of nasopharynx

C11 is the ICD-10-CM diagnosis code for malignant neoplasm of nasopharynx. 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 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: C11.0 (nasopharynx), C11.1 (nasopharynx), C11.2 (nasopharynx), C11.3 (nasopharynx), C11.8 (nasopharynx) and C11.9 (unspecified).

Use an additional code to identify: 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), tobacco dependence (F17.-) and 1 more.

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