I99.9 Unspecified disorder of circulatory system

Billable ICD-10-CM code, FY2026.

MS-DRG index

Defines the logic of DRG(s) 302-303 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 459.9 Unspecified circulatory system disorder (approximate)

Diagnosis Index entries for I99.9

• Angiopathia, angiopathy
• Change (s) (in) (of) › circulatory
• Change (s) (in) (of) › vascular
• Circulation › defective (lower extremity)
• Complication (s) (from) (of) › vascular
• Damage › vascular
• Defect, defective › circulation
• Defect, defective › vascular (local)
• Deficiency, deficient › vascular
• Disease, diseased › blood › vessel
• Disease, diseased › vascular
• Disturbance (s) › circulatory
• Disturbance (s) › vascular
• Lesion (s) (nontraumatic) › vascular

Nearby codes

• I99 Other and unspecified disorders of circulatory system
• I99.8 Other disorder of circulatory system
• I99.9 Unspecified disorder of circulatory system (this code)