C10.8 (Malignant neoplasm of overlapping sites of oropharynx) compared with D37.05 (Neoplasm of uncertain behavior of pharynx), from the official CMS tabular data. C10.8 and D37.05 name the same anatomical site (epiglottis) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — uncertain behavior (epiglottis)
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. C10.8 and D37.05 name the same anatomical site (epiglottis) 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.
| C10.8Malignant neoplasm of overlapping sites of oropharynx | D37.05Neoplasm of uncertain behavior of pharynx | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Malignant neoplasm of overlapping sites of oropharynx is a billable ICD-10-CM diagnosis code (C10.8). | Neoplasm of uncertain behavior of pharynx is a billable ICD-10-CM diagnosis code (D37.05). |
| Includes | Malignant neoplasm of junctional region of oropharynx | Neoplasm of uncertain behavior of aryepiglottic fold of pharynx NOS Neoplasm of uncertain behavior of hypopharyngeal aspect of aryepiglottic fold of pharynx Neoplasm of uncertain behavior of marginal zone of aryepiglottic fold of pharynx |
| Use additional code | code to identify: alcohol abuse and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources