ICD-10-CM 2027 diagnosis code

I02Rheumatic chorea

Not billable — use a more specific code

I02 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About I02

I02 is the ICD-10-CM diagnosis code for rheumatic chorea. It belongs to block I00-I02 (acute rheumatic fever) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: I02.0 (with heart involvement) and I02.9 (without heart involvement).

Don't report I02 together with the conditions in its Excludes1 note: chorea NOS (G25.5) and Huntington's chorea (G10).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under I02

Coding notes

IncludesFurther defines the content of the category

Sydenham's chorea

Excludes1Not coded here — never report together with this code

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

Notes that apply from higher levels

Instructions written at a parent level also apply to I02.

Broader instructions also apply from Chapter 9: Diseases of the circulatory system.

Codes whose notes reference I02

G25.5Excludes1
G25.5Excludes1

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about I02

Is I02 billable?: No. I02 is a header code. Report one of its more specific subcodes instead.