I25.8 is the authoritative medical code for Other forms of chronic ischemic heart disease. This classification is used in medical billing and clinical recording to specify the clinical criteria for other forms of chronic ischemic heart disease (ICD-10-CM I25.8), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Other forms of chronic ischemic heart disease is a non-billable ICD-10-CM category code I25.8. A more specific billable subcode must be selected for claims submission. 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. Code also: the presence of hypertension I10-I1A.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for I25.8 in the official ICD-10-CM tabular list.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- non-ischemic myocardial injury I5A
Code Also
Additional codes that may be required to fully describe the encounter.
- the presence of hypertension I10-I1A
Use Additional Code
Supplementary codes the tabular list directs you to add.
- 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
Frequently Asked Questions (FAQ) & Clinical Guidance
Can I25.8 be billed directly?
No. I25.8 (Other forms of chronic ischemic heart disease) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Can I25.8 be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, I25.8 and the following are not considered part of each other and may both be reported when both conditions are present: non-ischemic myocardial injury (I5A).
Is an additional code needed with I25.8?
Use additional code(s) to specify: code to identify:; chronic total occlusion of coronary artery (I25.82); exposure to environmental tobacco smoke (Z77.22); history of tobacco dependence (Z87.891).
Nearest Codes in This Family
Official ICD-10-CM classifications closest to I25.8 in its code family, with their registry titles.
- 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
- 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