C72.4 (Malignant neoplasm of acoustic nerve) compared with D33.3 (Benign neoplasm of cranial nerves), from the official CMS tabular data. C72.4 and D33.3 name the same anatomical site (acoustic nerve) with a different neoplasm behavior. MedCoder-derived
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (acoustic nerve)
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. C72.4 and D33.3 name the same anatomical site (acoustic nerve) 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.
| C72.4Malignant neoplasm of acoustic nerve | D33.3Benign neoplasm of cranial nerves | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant neoplasm of acoustic nerve is a non-billable ICD-10-CM category code (C72.4). | Benign neoplasm of cranial nerves is a billable ICD-10-CM diagnosis code (D33.3). |
| Includes | — | Benign neoplasm of olfactory bulb |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources