2026 ICD-10-CM Diagnosis Code D00.03Carcinoma in situ of gingiva and edentulous alveolar ridge
ICD-10-CM Codes›C00–D49›D00-D09›D00
- Billable — Valid for Submission
- Chronic Condition
D00.03 is a billable ICD-10-CM diagnosis code for carcinoma in situ of gingiva and edentulous alveolar ridge. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 146 through 148. Coders also document this condition as carcinoma in situ of alveolar ridge mucosa. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Head and neck cancers - lip and oral cavity.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Carcinoma in situ of alveolar ridge mucosa
- Carcinoma in situ of gingival mucosa
- Carcinoma in situ of gum
- Carcinoma in situ of lower gum
- Carcinoma in situ of upper gum
- Neoplasm of alveolar ridge mucosa
- Neoplasm of lower gum
- Neoplasm of upper gum
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
| Site | Malig. Primary | Malig. Secondary | Ca in situ | Benign | Uncertain | Unspec. |
|---|---|---|---|---|---|---|
| alveolar | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| alveolar › mucosa | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| alveolar › mucosa › lower | C03.1 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| alveolar › mucosa › upper | C03.0 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| alveolar › ridge or process › mucosa | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| alveolar › ridge or process › mucosa › lower | C03.1 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| alveolar › ridge or process › mucosa › upper | C03.0 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| alveolus | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| alveolus › lower | C03.1 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| alveolus › upper | C03.0 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| connective tissue NEC › jaw | C03.9 | C79.89 | D00.03 | D10.39 | D48.1 | D49.0 |
| gingiva (alveolar) (marginal) | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| gingiva (alveolar) (marginal) › lower | C03.1 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| gingiva (alveolar) (marginal) › mandibular | C03.1 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| gingiva (alveolar) (marginal) › maxillary | C03.0 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| gingiva (alveolar) (marginal) › upper | C03.0 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| gum | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| gum › lower | C03.1 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| gum › upper | C03.0 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| interdental papillae | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| interdental papillae › lower | C03.1 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| interdental papillae › upper | C03.0 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| jaw › soft tissues | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| jaw › soft tissues › lower | C03.1 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| jaw › soft tissues › upper | C03.0 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| mandible › alveolar | C03.1 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| mandible › alveolar › mucosa (carcinoma) | C03.1 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| maxilla, maxillary (superior) › alveolar | C03.0 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| maxilla, maxillary (superior) › alveolar › mucosa | C03.0 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| mucosa | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| mucosa › alveolar (ridge or process) | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| mucosa › alveolar (ridge or process) › lower | C03.1 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| mucosa › alveolar (ridge or process) › upper | C03.0 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| periodontal tissue NEC | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
| tooth socket NEC | C03.9 | C79.89 | D00.03 | D10.39 | D37.09 | D49.0 |
Patient EducationClinical
Oral Cancer
Oral cancer is cancer of the mouth. It is a type of head and neck cancer. Most oral cancers are squamous cell cancers. They begin in the flat cells that cover the surfaces of your mouth, tongue, and lips. The cancer cells may spread into deeper tissue as the cancer grows.
The full article covers:
- What is oral cancer?
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Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert D00.03 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D00.03Overview
Is D00.03 (Carcinoma in situ of lip, oral cavity and pharynx) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report carcinoma in situ of gingiva and edentulous alveolar ridge on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D00.03 group to?
When carcinoma in situ of gingiva and edentulous alveolar ridge is the principal diagnosis on an inpatient stay, it groups to MS-DRG 146, 147, 148, with relative weights from 0.7971 to 2.1174 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of D00.03?
Under the General Equivalence Mappings, carcinoma in situ of gingiva and edentulous alveolar ridge converts to ICD-9-CM 230.0 (ca in situ oral cav/phar). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
