Is C24.9 a billable ICD-10-CM code?

Yes. C24.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does C24.9 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of digestive organs (C15-C26).

What cannot be coded together with C24.9?

C24.9 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 C24.9 (C24) and apply to it just the same.

C24.9

C24.9 — Malignant neoplasm of biliary tract, unspecified

Billable / specific codeICD-10-CM

C24.9 is a billable, specific ICD-10-CM code for malignant neoplasm of biliary tract, unspecified. It is valid for submission on a claim.

Excludes1 inherited from the categories above C24.9

These are not written on C24.9, but they bind it: a note on a category applies to every code beneath it. Billing C24.9 with anything listed here is a denial.

Written on C24 — Malignant neoplasm of other and unspecified parts of biliary tract

malignant neoplasm of intrahepatic bile duct (C22.1)

Other codes that can never be billed with C24.9

These codes carry an Excludes1 note pointing at C24.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C24.9 alone.

C22Malignant neoplasm of liver and intrahepatic bile ducts

Risk adjustment

C24.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 20 Lung and Other Severe Cancers1.136 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

C24.9 is named in 55 Medicare coverage policies — 55 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

C24.9 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 C24. If C24.9 is not quite right, the correct code is usually one of these.

Questions about C24.9

Is C24.9 a billable ICD-10-CM code?: Yes. C24.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C24.9 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of digestive organs (C15-C26).
What cannot be coded together with C24.9?: C24.9 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 C24.9 (C24) and apply to it just the same.