C30.1 (Malignant neoplasm of middle ear) compared with D14.0 (Benign neoplasm of middle ear, nasal cavity and accessory sinuses), from the official CMS tabular data. C30.1 and D14.0 name the same anatomical site (antrum) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — primary malignancy (antrum)
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. D14.0 and C30.1 name the same anatomical site (antrum) 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.
| C30.1Malignant neoplasm of middle ear | D14.0Benign neoplasm of middle ear, nasal cavity and accessory sinuses | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant neoplasm of middle ear is a billable ICD-10-CM diagnosis code (C30.1). | Benign neoplasm of middle ear, nasal cavity and accessory sinuses is a billable ICD-10-CM diagnosis code (D14.0). |
| Includes | malignant neoplasm of middle ear Malignant neoplasm of antrum tympanicum Malignant neoplasm of auditory tube Malignant neoplasm of eustachian tube | Benign neoplasm of cartilage of nose |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources