Is I02 a billable ICD-10-CM code?

No. I02 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does I02 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Acute rheumatic fever (I00-I02).

What cannot be coded together with I02?

I02 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

I02

I02 — Rheumatic chorea

Non-billable headerICD-10-CM

I02 is a non-billable header ICD-10-CM code for rheumatic chorea. 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.

chorea NOS (G25.5)
Huntington's chorea (G10)

Includes

Conditions this code covers.

Sydenham's chorea

Other codes that can never be billed with I02

These codes carry an Excludes1 note pointing at I02. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I02 alone.

G25.5Other chorea

Risk adjustment

I02 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 I02

2 child codes. Green means billable.

Questions about I02

Is I02 a billable ICD-10-CM code?: No. I02 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I02 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Acute rheumatic fever (I00-I02).
What cannot be coded together with I02?: I02 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.