I25.82 Chronic total occlusion of coronary artery

Billable ICD-10-CM code, FY2026.

Applicable to

• Complete occlusion of coronary artery
• Total occlusion of coronary artery

Excludes1 (never code together)

• acute coronary occlusion with myocardial infarction (I21.0-I21.B, I22.-)
• acute coronary occlusion without myocardial infarction (I24.0)

Code first

• coronary atherosclerosis (I25.1-, I25.7-, I25.81-)

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.

Approximate ICD-9-CM (GEMs)

• 414.2 Chronic total occlusion of coronary artery

Medicare Code Edits (MCE v43.1 (April 2026))

• Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Code annotations containing back-references to I25.82

Back-references to I25.82

• Use Additional: I25 Chronic ischemic heart disease ("chronic total occlusion of coronary artery (I25.82)")

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 I25.82

• Occlusion, occluded › artery › complete › coronary
• Occlusion, occluded › artery › coronary (acute) (thrombotic) (without myocardial infarction) › chronic total
• Occlusion, occluded › artery › coronary (acute) (thrombotic) (without myocardial infarction) › complete
• Occlusion, occluded › artery › coronary (acute) (thrombotic) (without myocardial infarction) › total (chronic)
• Occlusion, occluded › artery › total (chronic) › coronary
• Occlusion, occluded › coronary (artery) (vein) (thrombotic) › chronic total
• Occlusion, occluded › coronary (artery) (vein) (thrombotic) › total (chronic)

Nearby codes

• I25.8 Other forms of chronic ischemic heart disease
• I25.81 Atherosclerosis of other coronary vessels without angina pectoris
• I25.810 Atherosclerosis of coronary artery bypass graft(s) without angina pectoris
• 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 (this code)
• I25.83 Coronary atherosclerosis due to lipid rich plaque
• I25.84 Coronary atherosclerosis due to calcified coronary lesion
• I25.85 Chronic coronary microvascular dysfunction
• I25.89 Other forms of chronic ischemic heart disease
• I25.9 Chronic ischemic heart disease, unspecified