D00.00 (Carcinoma in situ of oral cavity, unspecified site) compared with D11.9 (Benign neoplasm of major salivary gland, unspecified), from the official CMS tabular data. D00.00 and D11.9 name the same anatomical site (salivary gland or duct) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (salivary gland or duct)
The behavior documented for the site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column of the neoplasm table, and therefore which code, applies.
Source: CMS Table of Neoplasms
Same site, different neoplasm behavior. D00.00 and D11.9 name the same anatomical site (salivary gland or duct) with a different neoplasm behavior.
From the CMS/CDC Table of Neoplasms: the behavior documented for that site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column, and therefore which code, applies.
| D00.00Carcinoma in situ of oral cavity, unspecified site | D11.9Benign neoplasm of major salivary gland, unspecified | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Carcinoma in situ of oral cavity, unspecified site is a billable ICD-10-CM diagnosis code (D00.00). | Benign neoplasm of major salivary gland, unspecified is a billable ICD-10-CM diagnosis code (D11.9). |
| Includes | Bowen's disease erythroplasia grade III intraepithelial neoplasia Queyrat's erythroplasia | — |
| Use additional code | code to identify: exposure to environmental tobacco smoke (Z77.22) exposure to tobacco smoke in the perinatal period (P96.81) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources