2026 ICD-10-CM Diagnosis Code I02.9Rheumatic chorea without heart involvement

ICD-10-CM Codes›I00–I99›I00-I02›I02

ICD-10-CM I02.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I02.9 is a billable ICD-10-CM diagnosis code for rheumatic chorea without heart involvement. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 314 through 316. Coders also document this condition as autoimmune movement disorder. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acute rheumatic heart disease and Bacterial infections.

Code Identity

ICD-10-CM Code
I02.9
Billable Status
Yes — Valid for Submission
Code Describes
Rheumatic chorea without heart involvement
Short Description
Rheumatic chorea without heart involvement
Same as the full description in the CMS dataset.
Parent Code
I02
Rheumatic chorea

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI00-I02Acute rheumatic fever
CategoryI02Rheumatic chorea
This CodeI02.9Rheumatic chorea without heart involvement

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Autoimmune movement disorder
  • Chorea due to and following infective disorder
  • Chorea due to immunological disorder
  • Rheumatic chorea
  • Rheumatic chorea without heart involvement
  • Secondary tic disorder
  • Tic disorder due to rheumatic chorea

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Rheumatic chorea NOS

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Chorea(chronic) (gravis) (posthemiplegic) (senile) (spasmodic)
      • with
        • heart involvement
          • rheumatic
    • Chorea(chronic) (gravis) (posthemiplegic) (senile) (spasmodic)
      • minor
    • Chorea(chronic) (gravis) (posthemiplegic) (senile) (spasmodic)
      • rheumatic (chronic)
    • Chorea(chronic) (gravis) (posthemiplegic) (senile) (spasmodic)
      • Sydenham's
    • Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)
      • rheumatic (active) (acute) (chronic) (subacute)
        • with central nervous system involvement

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR002
Acute rheumatic heart disease
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Movement Disorders

Movement disorders are neurologic conditions that cause problems with movement, such as:

Read the full article at MedlinePlus

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Convert I02.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
392.9 Rheumatic chorea NOS
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I02.9Overview

Is I02.9 (Rheumatic chorea) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report rheumatic chorea without heart involvement on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I02.9 group to?

When rheumatic chorea without heart involvement is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 315, 316, with relative weights from 0.6821 to 2.0852 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of I02.9?

Under the General Equivalence Mappings, rheumatic chorea without heart involvement converts to ICD-9-CM 392.9 (rheumatic chorea NOS). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.