D00.0Carcinoma in situ of lip, oral cavity and pharynx

D00.0 is the ICD-10-CM diagnosis code for carcinoma in situ of lip, oral cavity and pharynx. It belongs to category D00 (carcinoma in situ of oral cavity, esophagus and stomach), block D00-D09 (in situ neoplasms) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.

Within D00 (carcinoma in situ of oral cavity, esophagus and stomach), D00.0 is specifically for carcinoma in situ of lip, oral cavity and pharynx. Related codes cover esophagus (D00.1) and stomach (D00.2).

To report this condition, pick the subcode that matches the documentation: D00.00 (site), D00.01 (border), D00.02 (mucosa), D00.03 (ridge), D00.04 (palate), D00.05 (palate), D00.06 (mouth), D00.07 (tongue) and 1 more.

Don't report D00.0 together with the conditions in its Excludes1 note: carcinoma in situ of aryepiglottic fold or interarytenoid fold, laryngeal aspect (D02.0), carcinoma in situ of epiglottis NOS (D02.0), carcinoma in situ of epiglottis suprahyoid portion (D02.0) and carcinoma in situ of skin of lip (D03.0, D04.0).

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.