Is C30.1 a billable ICD-10-CM code?

Yes. C30.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does C30.1 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of respiratory and intrathoracic organs (C30-C39).

What cannot be coded together with C30.1?

C30.1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.

C30.1

C30.1 — Malignant neoplasm of middle ear

Billable / specific codeICD-10-CM

C30.1 is a billable, specific ICD-10-CM code for malignant neoplasm of middle ear. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

malignant neoplasm of auricular canal (external) (C43.2-,C44.2-)
malignant neoplasm of bone of ear (meatus) (C41.0)
malignant neoplasm of cartilage of ear (C49.0)
malignant melanoma of skin of (external) ear (C43.2-)
other and unspecified malignant neoplasm of skin of (external) ear (C44.2-)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Malignant neoplasm of antrum tympanicum
Malignant neoplasm of auditory tube
Malignant neoplasm of eustachian tube
Malignant neoplasm of inner ear
Malignant neoplasm of mastoid air cells
Malignant neoplasm of tympanic cavity

Risk adjustment

C30.1 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 21 Lymphoma and Other Cancers0.671 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

C30.1 is named in 66 Medicare coverage policies — 66 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

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Code history

C30.1 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share C30. If C30.1 is not quite right, the correct code is usually one of these.

C30.0Malignant neoplasm of nasal cavity

Questions about C30.1

Is C30.1 a billable ICD-10-CM code?: Yes. C30.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C30.1 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of respiratory and intrathoracic organs (C30-C39).
What cannot be coded together with C30.1?: C30.1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.