D00.08 (Carcinoma in situ of pharynx) compared with D10.9 (Benign neoplasm of pharynx, unspecified), from the official CMS tabular data. D00.08 and D10.9 name the same anatomical site (pharynx) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (pharynx)
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. D00.08 and D10.9 name the same anatomical site (pharynx) 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.
| D00.08Carcinoma in situ of pharynx | D10.9Benign neoplasm of pharynx, unspecified | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Carcinoma in situ of pharynx is a billable ICD-10-CM diagnosis code (D00.08). | Benign neoplasm of pharynx, unspecified is a billable ICD-10-CM diagnosis code (D10.9). |
| 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