I25.4 – Coronary artery aneurysm and dissection
ICD-10-CM 2027 diagnosis code · Ischemic heart diseases
ICD-10-CM code
I25.4
- Code
I25.4(claims format:I254)- Description
- Coronary artery aneurysm and dissection
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 9. Diseases of the circulatory system (I00-I99)
- Block
- I20-I25 Ischemic heart diseases
- Parent codes
- I25
Billable codes under I25.4
I25.4 is a header code and cannot be used on claims. Choose the most specific code:
- I25.41 – Coronary artery aneurysmBillable
- I25.42 – Coronary artery dissectionBillable
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
I25 – Chronic ischemic heart disease
Excludes2 (not included here):
- non-ischemic myocardial injury (I5A)
Use additional code:
Block I20-I25
Related codes in I25
- I25.1 – Atherosclerotic heart disease of native coronary arteryHeader
- I25.2 – Old myocardial infarctionBillable
- I25.3 – Aneurysm of heartBillable
- I25.5 – Ischemic cardiomyopathyBillable
- I25.6 – Silent myocardial ischemiaBillable
- I25.7 – Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectorisHeader
- I25.8 – Other forms of chronic ischemic heart diseaseHeader
- I25.9 – Chronic ischemic heart disease, unspecifiedBillable
Frequently asked questions
What is ICD-10 code I25.4?
I25.4 is the ICD-10-CM code for coronary artery aneurysm and dissection, in the block I20-I25 (Ischemic heart diseases).
Is I25.4 a billable code?
No. I25.4 is a header code with more specific child codes; report one of the billable codes listed above.
What category does I25.4 belong to?
It belongs to category I25 – Chronic ischemic heart disease.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.