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I992026

Non-billable

Other and unspecified disorders of circulatory system

I99 is a non-billable ICD-10-CM category (header) code for Other and unspecified disorders of circulatory system; a more specific code below it is required for claims in the FY2026 code set.

Clinical Notes

Frequently Asked Questions

Code Hierarchy
I99
Other and unspecified disorders of circulatory system
Other disorder of circulatory system
Unspecified disorder of circulatory system

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Related MS-DRGs
19,810 Medicare hospitalizations across 2 DRGs for codes in I99

Top DRGs associated with codes in this category:

303ATHEROSCLEROSIS WITHOUT MCC15,378
302ATHEROSCLEROSIS WITH MCC4,432
Official Guidelines
Chapter 9: Diseases of the Circulatory System

Official coding guidelines for I00-I99

Other and unspecified disorders of circulatory system - ICD-10 Code I99 | FindICD10