C11.3 (Malignant neoplasm of anterior wall of nasopharynx) compared with D10.6 (Benign neoplasm of nasopharynx), from the official CMS tabular data. C11.3 and D10.6 name the same anatomical site (choana) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (choana)
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. C11.3 and D10.6 name the same anatomical site (choana) 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.
| C11.3Malignant neoplasm of anterior wall of nasopharynx | D10.6Benign neoplasm of nasopharynx | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant neoplasm of anterior wall of nasopharynx is a billable ICD-10-CM diagnosis code (C11.3). | Benign neoplasm of nasopharynx is a billable ICD-10-CM diagnosis code (D10.6). |
| Includes | Malignant neoplasm of floor of nasopharynx Malignant neoplasm of nasopharyngeal (anterior) (posterior) surface of soft palate Malignant neoplasm of posterior margin of nasal choana Malignant neoplasm of posterior margin of nasal septum | Benign neoplasm of pharyngeal tonsil Benign neoplasm of posterior margin of septum and choanae |
| 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