Is C17.8 a billable ICD-10-CM code?

Yes. C17.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does C17.8 sit in the tabular list?

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

What cannot be coded together with C17.8?

C17.8 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 C17.8 (C17) and apply to it just the same.

C17.8

C17.8 — Malignant neoplasm of overlapping sites of small intestine

Billable / specific codeICD-10-CM

C17.8 is a billable, specific ICD-10-CM code for malignant neoplasm of overlapping sites of small intestine. It is valid for submission on a claim.

Excludes1 inherited from the categories above C17.8

These are not written on C17.8, but they bind it: a note on a category applies to every code beneath it. Billing C17.8 with anything listed here is a denial.

Written on C17 — Malignant neoplasm of small intestine

malignant carcinoid tumors of the small intestine (C7A.01)

Risk adjustment

C17.8 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

C17.8 is named in 78 Medicare coverage policies — 78 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

C17.8 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 C17. If C17.8 is not quite right, the correct code is usually one of these.

Questions about C17.8

Is C17.8 a billable ICD-10-CM code?: Yes. C17.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C17.8 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of digestive organs (C15-C26).
What cannot be coded together with C17.8?: C17.8 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 C17.8 (C17) and apply to it just the same.