I25.4
Coronary artery aneurysm and dissection
Non-billable headerNot valid on its own. Use one of the more specific codes under it.
I25.4 is a non-billable ICD-10-CM code header for coronary artery aneurysm and dissection. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are I25.41 Coronary artery aneurysm and I25.42 Coronary artery dissection. Its coding notes include a Use additional code instruction, a Code also instruction and 11 Excludes2 entries.
Use additional code
Add the listed code as a secondary code, if known.
Inherited from I25 Chronic ischemic heart disease
Code also
Two codes may be needed to describe the condition. This note gives no sequencing order.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (10 notes)
Inherited from Chapter 9 Diseases of the circulatory system
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)