Is C71 a billable ICD-10-CM code?

No. C71 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C71 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of eye, brain and other parts of central nervous system (C69-C72).

What cannot be coded together with C71?

C71 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

C71

C71 — Malignant neoplasm of brain

Non-billable headerICD-10-CM

C71 is a non-billable header ICD-10-CM code for malignant neoplasm of brain. 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 neoplasm of cranial nerves (C72.2-C72.5)
retrobulbar malignant neoplasm (C69.6-)

Other codes that can never be billed with C71

These codes carry an Excludes1 note pointing at C71. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C71 alone.

C71.5Malignant neoplasm of cerebral ventricle

Risk adjustment

C71 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 C71

10 child codes. Green means billable.

Questions about C71

Is C71 a billable ICD-10-CM code?: No. C71 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C71 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of eye, brain and other parts of central nervous system (C69-C72).
What cannot be coded together with C71?: C71 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.