Is C66.2 a billable ICD-10-CM code?

Yes. C66.2 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does C66.2 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of urinary tract (C64-C68).

What cannot be coded together with C66.2?

C66.2 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 C66.2 (C66) and apply to it just the same.

C66.2

C66.2 — Malignant neoplasm of left ureter

Billable / specific codeICD-10-CMleft

C66.2 is a billable, specific ICD-10-CM code for malignant neoplasm of left ureter. It is valid for submission on a claim.

Excludes1 inherited from the categories above C66.2

These are not written on C66.2, but they bind it: a note on a category applies to every code beneath it. Billing C66.2 with anything listed here is a denial.

Written on C66 — Malignant neoplasm of ureter

malignant neoplasm of ureteric orifice of bladder (C67.6)

Risk adjustment

C66.2 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

C66.2 is named in 74 Medicare coverage policies — 74 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

C66.2 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 C66. If C66.2 is not quite right, the correct code is usually one of these.

Questions about C66.2

Is C66.2 a billable ICD-10-CM code?: Yes. C66.2 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C66.2 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of urinary tract (C64-C68).
What cannot be coded together with C66.2?: C66.2 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 C66.2 (C66) and apply to it just the same.