Is C79.83 a billable ICD-10-CM code?

Yes. C79.83 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does C79.83 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80).

What cannot be coded together with C79.83?

C79.83 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above C79.83 (C79) and apply to it just the same.

C79.83

C79.83 — Secondary malignant neoplasm of oral cavity

Billable / specific codeICD-10-CM

C79.83 is a billable, specific ICD-10-CM code for secondary malignant neoplasm of oral cavity. It is valid for submission on a claim.

Excludes1 inherited from the categories above C79.83

These are not written on C79.83, but they bind it: a note on a category applies to every code beneath it. Billing C79.83 with anything listed here is a denial.

Written on C79 — Secondary malignant neoplasm of other and unspecified sites

secondary carcinoid tumors (C7B.-)
secondary neuroendocrine tumors (C7B.-)

Risk adjustment

C79.83 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

C79.83 is named in 9 Medicare coverage policies — 9 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52479Oral Anticancer Drugs - Policy Article
A52480Oral Antiemetic Drugs (Replacement for Intravenous Antiemetics) - Policy Article
A56621Billing and Coding: Swallowing Studies for Dysphagia
A56695Billing and Coding: Implantable Infusion Pump

Code history

What changed, and when. Derived by diffing consecutive CMS release files — which matters when you are defending a code assigned under an earlier edition.

addedFY2024-FY2027
Secondary malignant neoplasm of oral cavity

Related codes at this level

Codes that share C79.8. If C79.83 is not quite right, the correct code is usually one of these.

Questions about C79.83

Is C79.83 a billable ICD-10-CM code?: Yes. C79.83 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C79.83 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80).
What cannot be coded together with C79.83?: C79.83 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above C79.83 (C79) and apply to it just the same.