I99.9
ICD-10BillableUnspecified disorder of circulatory system
Official ICD-10-CM descriptor (FY2026)
Unspecified disorder of circulatory system
I99.9 is valid for submission on a claim — CMS flags it as a billable, specific code.
Related codes in I99
Where this code sits
- Parent code
- I99
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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.