ICD10
ICD-10 Code I25.4: Coronary artery aneurysm and dissection
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 coronary artery aneurysm and dissection 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 Physician
Sibling codes
I25.1Atherosclerotic heart disease of native coronary arteryI25.2Old myocardial infarctionbillableI25.3Aneurysm of heartbillableI25.5Ischemic cardiomyopathybillableI25.6Silent myocardial ischemiabillableI25.7Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectorisI25.8Other forms of chronic ischemic heart diseaseI25.9Chronic ischemic heart disease, unspecifiedbillable
Mapped diagnoses and classifications
SNOMED_CT 75473000high
Acquired arteriovenous fistula of heart
Source: SNOMED International ICD-10 map
SNOMED_CT 286391000119108high
Acquired coronary artery fistula
Source: SNOMED International ICD-10 map
SNOMED_CT 1204153007high
Acute dissection of coronary artery
Source: SNOMED International ICD-10 map
SNOMED_CT 16025471000119107high
Aneurysm of coronary artery due to and following acute febrile mucocutaneous lymph node syndrome
Source: SNOMED International ICD-10 map
SNOMED_CT 50570003high
Aneurysm of coronary vessels
Source: SNOMED International ICD-10 map
SNOMED_CT 461423005high
Arteriovenous fistula of coronary artery to coronary sinus
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
I25.4
Replacement codes
I25.41 — Coronary artery aneurysmI25.42 — Coronary artery dissection
Common synonyms
Coronary artery aneurysm and dissection
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.