Is I02.9 a billable ICD-10-CM code?

Yes. I02.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does I02.9 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 I02.9?

I02.9 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 I02.9 (I02) and apply to it just the same.

I02.9

I02.9 — Rheumatic chorea without heart involvement

Billable / specific codeICD-10-CM

I02.9 is a billable, specific ICD-10-CM code for rheumatic chorea without heart involvement. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Rheumatic chorea NOS

Excludes1 inherited from the categories above I02.9

These are not written on I02.9, but they bind it: a note on a category applies to every code beneath it. Billing I02.9 with anything listed here is a denial.

Written on I02 — Rheumatic chorea

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

Other codes that can never be billed with I02.9

These codes carry an Excludes1 note pointing at I02.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I02.9 alone.

G25.5Other chorea

Risk adjustment

I02.9 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.

Medicare coverage

I02.9 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56781Billing and Coding: Transthoracic Echocardiography (TTE)
A57306Billing and Coding: Transthoracic Echocardiography (TTE)
A57326Billing and Coding: Electrocardiograms

How I02.9 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 I02.9.

Chorea›minor
Chorea›rheumatic(chronic)
Chorea›Sydenham's
Fever›rheumatic›with central nervous system involvement
Chorea›with›heart involvement›rheumatic

Code history

I02.9 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 I02. If I02.9 is not quite right, the correct code is usually one of these.

I02.0Rheumatic chorea with heart involvement

Questions about I02.9

Is I02.9 a billable ICD-10-CM code?: Yes. I02.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I02.9 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 I02.9?: I02.9 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 I02.9 (I02) and apply to it just the same.