| D00 | Carcinoma in situ of oral cavity, esophagus and stomach | NON-BILLABLE CODE |
| D00.0 | Carcinoma in situ of lip, oral cavity and pharynx | NON-BILLABLE CODE |
| D00.00 | Carcinoma in situ of oral cavity, unspecified site | BILLABLE CODE |
| D00.01 | Carcinoma in situ of labial mucosa and vermilion border | BILLABLE CODE |
| D00.02 | Carcinoma in situ of buccal mucosa | BILLABLE CODE |
| D00.03 | Carcinoma in situ of gingiva and edentulous alveolar ridge | BILLABLE CODE |
| D00.05 | Carcinoma in situ of hard palate | BILLABLE CODE |
| D00.06 | Carcinoma in situ of floor of mouth | BILLABLE CODE |
| D00.07 | Carcinoma in situ of tongue | BILLABLE CODE |
| D00.08 | Carcinoma in situ of pharynx | BILLABLE CODE |
| D00.1 | Carcinoma in situ of esophagus | BILLABLE CODE |
| D00.2 | Carcinoma in situ of stomach | BILLABLE CODE |
