C30.1 vs C44.2
C30.1 (Malignant neoplasm of middle ear) compared with C44.2 (Other and unspecified malignant neoplasm of skin of ear and external auricular canal), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. C30.1 carries an Excludes1 note covering C44.2: “malignant neoplasm of auricular canal (external) (C43.2-,C44.2-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. C30.1 carries an Excludes1 note covering C44.2: “other and unspecified malignant neoplasm of skin of (external) ear (C44.2-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| C30.1Malignant neoplasm of middle ear | C44.2Other and unspecified malignant neoplasm of skin of ear and external auricular canal | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| 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). | Other and unspecified malignant neoplasm of skin of ear and external auricular canal is a non-billable ICD-10-CM category code (C44.2). |
| Includes | malignant neoplasm of middle ear Malignant neoplasm of antrum tympanicum Malignant neoplasm of auditory tube Malignant neoplasm of eustachian tube | malignant neoplasm of sebaceous glands malignant neoplasm of sweat glands |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources