I25.42 Coronary artery dissection

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.

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) 314-316 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 414.12 Dissection of coronary artery

Code annotations containing back-references to I25.42

Back-references to I25.42

• Type 2 Excludes: I72 Other aneurysm ("coronary artery dissection (I25.42)")
• Type 2 Excludes: I77.7 Other arterial dissection ("dissection of coronary artery (I25.42)")

Back-references to I25.4

• Type 2 Excludes: I72 Other aneurysm ("coronary aneurysm (I25.4)")
• Type 2 Excludes: I77.0 Arteriovenous fistula, acquired ("coronary (I25.4)")

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 I25.42

• Dissection › artery › coronary

Nearby codes

• I25.119 Atherosclerotic heart disease of native coronary artery with unspecified angina pectoris
• I25.2 Old myocardial infarction
• I25.3 Aneurysm of heart
• I25.4 Coronary artery aneurysm and dissection
• I25.41 Coronary artery aneurysm
• I25.42 Coronary artery dissection (this code)
• I25.5 Ischemic cardiomyopathy
• I25.6 Silent myocardial ischemia
• I25.7 Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris
• I25.70 Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris
• I25.700 Atherosclerosis of coronary artery bypass graft(s), unspecified, with unstable angina pectoris