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ICD-10-CM 2027

ICD-10 code for coronary aneurysm

I25.41

Coronary artery aneurysm

✓ Billable / specific

From the official ICD-10-CM alphabetic index entry “Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › coronary (arteriosclerotic) (artery)”. Page updated September 29, 2026.

About coding coronary aneurysm

The ICD-10-CM code for coronary aneurysm is I25.41 (Coronary artery aneurysm). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I25.41.

Within I25.4 (coronary artery aneurysm and dissection), I25.41 is specifically for coronary artery aneurysm. Related codes cover dissection (I25.42).

Don't report I25.41 together with the conditions in its Excludes1 note: congenital coronary (artery) aneurysm (Q24.5).

Use an additional 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.-) and 1 more.

More specific coronary aneurysm codes (official index)

  • arteriovenous, congenital Q24.5 — Malformation of coronary vessels
  • congenital Q24.5 — Malformation of coronary vessels
  • ruptured
  • syphilitic A52.06 — Other syphilitic heart involvement
  • vein I25.89 — Other forms of chronic ischemic heart disease

Don't confuse with (Excludes1 for I25.41)

  • congenital coronary (artery) aneurysm (Q24.5)

Common questions about coronary aneurysm ICD-10 codes

What is the ICD-10 code for coronary aneurysm?

I25.41 — Coronary artery aneurysm. More specific codes apply when the documentation supports them: Q24.5, Q24.5, A52.06, I25.89.

What is the ICD-10 code for congenital coronary aneurysm?

Q24.5 — Malformation of coronary vessels.

What is the ICD-10 code for syphilitic coronary aneurysm?

A52.06 — Other syphilitic heart involvement.

What is the ICD-10 code for vein coronary aneurysm?

I25.89 — Other forms of chronic ischemic heart disease.

Is I25.41 billable?

Yes. I25.41 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can I25.41 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict I25.41 as a principal diagnosis.

Is I25.41 a CC or MCC?

No. I25.41 is neither a CC nor an MCC under MS-DRG v44.0.