Is C18.7 a billable ICD-10-CM code?

Yes. C18.7 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does C18.7 sit in the tabular list?

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

What cannot be coded together with C18.7?

C18.7 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

C18.7

C18.7 — Malignant neoplasm of sigmoid colon

Billable / specific codeICD-10-CM

C18.7 is a billable, specific ICD-10-CM code for malignant neoplasm of sigmoid colon. 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 rectosigmoid junction (C19)

Inclusion terms

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

Malignant neoplasm of sigmoid (flexure)

Risk adjustment

C18.7 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 22 Bladder, Colorectal, and Other Cancers0.363 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

C18.7 is named in 105 Medicare coverage policies — 105 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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Related codes at this level

Codes that share C18. If C18.7 is not quite right, the correct code is usually one of these.

Questions about C18.7

Is C18.7 a billable ICD-10-CM code?: Yes. C18.7 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C18.7 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of digestive organs (C15-C26).
What cannot be coded together with C18.7?: C18.7 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.