I00
ICD-10BillableRheumatic fever without heart involvement
Official ICD-10-CM descriptor (FY2026)
Rheumatic fever without heart involvement
I00 is valid for submission on a claim: CMS flags it as a billable, specific code.
Includes
- arthritis, rheumatic, acute or subacute
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- rheumatic fever with heart involvement (I01.0 -I01.9)
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.