C00.5 (Malignant neoplasm of lip, unspecified, inner aspect) compared with D00.01 (Carcinoma in situ of labial mucosa and vermilion border), from the official CMS tabular data. C00.5 and D00.01 name the same anatomical site (lip) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — carcinoma in situ (lip)
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. C00.5 and D00.01 name the same anatomical site (lip) 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.
| C00.5Malignant neoplasm of lip, unspecified, inner aspect | D00.01Carcinoma in situ of labial mucosa and vermilion border | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant neoplasm of lip, unspecified, inner aspect is a billable ICD-10-CM diagnosis code (C00.5). | Carcinoma in situ of labial mucosa and vermilion border is a billable ICD-10-CM diagnosis code (D00.01). |
| Includes | Malignant neoplasm of buccal aspect of lip, unspecified Malignant neoplasm of frenulum of lip, unspecified Malignant neoplasm of mucosa of lip, unspecified Malignant neoplasm of oral aspect of lip, unspecified | 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