C02.1 (Malignant neoplasm of border of tongue) compared with D00.07 (Carcinoma in situ of tongue), from the official CMS tabular data. C02.1 and D00.07 name the same anatomical site (tongue) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — carcinoma in situ (tongue)
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. C02.1 and D00.07 name the same anatomical site (tongue) with a different neoplasm behavior.
From the CMS 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.
| C02.1Malignant neoplasm of border of tongue | D00.07Carcinoma in situ of tongue | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant neoplasm of border of tongue is a billable ICD-10-CM diagnosis code (C02.1). | Carcinoma in situ of tongue is a billable ICD-10-CM diagnosis code (D00.07). |
| Includes | Malignant neoplasm of tip of tongue | Bowen's disease erythroplasia grade III intraepithelial neoplasia Queyrat's erythroplasia |
| Use additional code | code to identify: alcohol abuse and dependence (F10.-) history of tobacco dependence (Z87.891) | 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