I25.85 Chronic coronary microvascular dysfunction

Billable ICD-10-CM code, FY2026.

Applicable to

• Chronic (presentation of) coronary microvascular disease
• Coronary microvascular dysfunction NOS

Applies from I25 Chronic ischemic heart disease

Excludes2 (not included here)

• non-ischemic myocardial injury (I5A)

Use additional code

• code to identify:
• chronic total occlusion of coronary artery (I25.82)
• exposure to environmental tobacco smoke (Z77.22)
• history of tobacco dependence (Z87.891)
• occupational exposure to environmental tobacco smoke (Z57.31)
• tobacco dependence (F17.-)
• tobacco use (Z72.0)

Risk adjustment (HCC)

• RxHCC V08: HCC 188 — Coronary Artery Disease

MS-DRG index

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

Code annotations containing back-references to I25.85

Back-references to I25

• Type 2 Excludes: I74 Arterial embolism and thrombosis ("coronary embolism and thrombosis (I21-I25)")
• Type 2 Excludes: I82 Other venous embolism and thrombosis ("coronary (I21-I25)")

Diagnosis Index entries for I25.85

• Disease, diseased › coronary (artery) › microvascular › chronic
• Dysfunction › chronic › coronary microvascular
• Dysfunction › coronary microvascular
• Dysfunction › coronary microvascular › chronic

Nearby codes

• I25.811 Atherosclerosis of native coronary artery of transplanted heart without angina pectoris
• I25.812 Atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectoris
• I25.82 Chronic total occlusion of coronary artery
• I25.83 Coronary atherosclerosis due to lipid rich plaque
• I25.84 Coronary atherosclerosis due to calcified coronary lesion
• I25.85 Chronic coronary microvascular dysfunction (this code)
• I25.89 Other forms of chronic ischemic heart disease
• I25.9 Chronic ischemic heart disease, unspecified