ICD10
ICD-10 Code I25.8: Other forms of chronic ischemic heart disease
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the circulatory system (I00-I99).
When is it used?
- May be used when a clinician documents other forms of chronic ischemic heart disease in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
9Diseases of the circulatory system (I00-I99)
block
I20-I25Ischemic heart diseases
category
I25Chronic ischemic heart disease
currentI25
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
CardiologistGeneral PhysicianENT Specialist
Related codes
Sibling codes
I25.1Atherosclerotic heart disease of native coronary arteryI25.2Old myocardial infarctionbillableI25.3Aneurysm of heartbillableI25.4Coronary artery aneurysm and dissectionI25.5Ischemic cardiomyopathybillableI25.6Silent myocardial ischemiabillableI25.7Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectorisI25.9Chronic ischemic heart disease, unspecifiedbillable
Mapped diagnoses and classifications
SNOMED_CT 679363171000119109high
Chronic microvascular ischemia of myocardium
Source: SNOMED International ICD-10 map
SNOMED_CT 117051000119103high
Chronic total occlusion of coronary artery
Source: SNOMED International ICD-10 map
SNOMED_CT 62827000high
Coronary arteritis
Source: SNOMED International ICD-10 map
SNOMED_CT 373093003high
Coronary artery fistula
Source: SNOMED International ICD-10 map
SNOMED_CT 697976003high
Coronary microvascular dysfunction
Source: SNOMED International ICD-10 map
SNOMED_CT 281093002high
Hibernating myocardium
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
I25.8
Replacement codes
I25.82 — Chronic total occlusion of coronary arteryI25.83 — Coronary atherosclerosis due to lipid rich plaqueI25.84 — Coronary atherosclerosis due to calcified coronary lesionI25.85 — Chronic coronary microvascular dysfunctionI25.89 — Other forms of chronic ischemic heart disease
Common synonyms
Other forms of chronic ischemic heart disease
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.