Carcinoma in situ of oral cavity, esophagus and stomach (D00) ICD-10-CM
The D00 code range covers carcinoma in situ of oral cavity, esophagus and stomach with 13 ICD-10-CM diagnosis codes. 11 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- melanoma in situ D03
Codes in the D00 Range 13 codes · 11 billable
- D00 Carcinoma in situ of oral cavity, esophagus and stomachNon-billable
- D00.0 Carcinoma in situ of lip, oral cavity and pharynxNon-billable
- D00.00 Carcinoma in situ of oral cavity, unspecified site
- D00.01 Carcinoma in situ of labial mucosa and vermilion border
- D00.02 Carcinoma in situ of buccal mucosa
- D00.03 Carcinoma in situ of gingiva and edentulous alveolar ridge
- D00.04 Carcinoma in situ of soft palate
- D00.05 Carcinoma in situ of hard palate
- D00.06 Carcinoma in situ of floor of mouth
- D00.07 Carcinoma in situ of tongue
- D00.08 Carcinoma in situ of pharynx
- D00.1 Carcinoma in situ of esophagus
- D00.2 Carcinoma in situ of stomach
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the D00 range.
Gastric Carcinoma In Situ
An intraepithelial carcinoma arising from the stomach without evidence of invasion.
Pharyngeal Carcinoma In Situ
An intraepithelial carcinoma that arises from the pharynx without evidence of invasion.
Stage 0 Esophageal Cancer AJCC v7
Stage 0 includes: For squamous cell carcinoma: Tis (HGD), N0, M0, G1, GX, Tumor location: Any. For adenocarcinoma: Tis (HGD), N0, M0, G1, GX. Tis: High-grade dysplasia. N0: No regional lymph node metastasis. M0: No distant metastasis. G1: Well differentiated. GX: Grade cannot be assessed-stage grouping as G1. Tumor location: Location of the primary cancer site is defined by the position of the upper (proximal) edge of the tumor in the esophagus. (AJCC 7th ed.)
About the D00 Code Range
Carcinoma in situ in this category involves the lip, mouth, throat, food pipe, or stomach. The codes are organized by location.
D00.0 groups the lip, mouth, and pharynx, or throat. Its subdivisions identify sites such as the cheek lining, gums, palate, floor of the mouth, and tongue. D00.00 identifies the oral cavity when no specific site is named. D00.1 identifies the esophagus, or food pipe, while D00.2 identifies the stomach.
Questions About This Page
How many billable codes are in the D00 range?
Of the 13 codes in this range, 11 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the D00 range classify?
The range classifies carcinoma in situ of oral cavity, esophagus and stomach. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
