Is C64 a billable ICD-10-CM code?

No. C64 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C64 sit in the tabular list?

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

What cannot be coded together with C64?

C64 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

C64

C64 — Malignant neoplasm of kidney, except renal pelvis

Non-billable headerICD-10-CM

C64 is a non-billable header ICD-10-CM code for malignant neoplasm of kidney, except renal pelvis. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

malignant carcinoid tumor of the kidney (C7A.093)
malignant neoplasm of renal calyces (C65.-)
malignant neoplasm of renal pelvis (C65.-)

Risk adjustment

C64 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.

Code to one of these instead C64

3 child codes. Green means billable.

Questions about C64

Is C64 a billable ICD-10-CM code?: No. C64 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C64 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of urinary tract (C64-C68).
What cannot be coded together with C64?: C64 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.