Is I01 a billable ICD-10-CM code?

No. I01 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does I01 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 I01?

I01 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

I01

I01 — Rheumatic fever with heart involvement

Non-billable headerICD-10-CM

I01 is a non-billable header ICD-10-CM code for rheumatic fever with heart involvement. 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.

chronic diseases of rheumatic origin (I05-I09) unless rheumatic fever is also present or there is evidence of reactivation or activity of the rheumatic process.

Other codes that can never be billed with I01

These codes carry an Excludes1 note pointing at I01. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I01 alone.

I00Rheumatic fever without heart involvement
I30Acute pericarditis
I33Acute and subacute endocarditis
I40Acute myocarditis

Risk adjustment

I01 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.

How I01 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I01.

Fever›rheumatic›active with heart involvement

Code to one of these instead I01

5 child codes. Green means billable.

Questions about I01

Is I01 a billable ICD-10-CM code?: No. I01 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I01 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 I01?: I01 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.