MCMCB Pro
I25.41

I25.41Coronary artery aneurysm

Billable / specific codeICD-10-CM

I25.41 is a billable, specific ICD-10-CM code for coronary artery aneurysm. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Coronary arteriovenous fistula, acquired

Risk adjustment

I25.41 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

I25.41 is named in 28 Medicare coverage policies 28 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
  • A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
  • A52868Billing and Coding: Transesophageal Echocardiography (TEE)
  • A56451Billing and Coding: Cardiac Computed Tomography (CCT) and Coronary Computed Tomography Angiography (CCTA)

How I25.41 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I25.41.

  • Aneurysmcoronary(arteriosclerotic) (artery)
  • Fistulacoronary, arteriovenous
  • Fistulaarteriovenouscoronary
  • Aneurysmarteriovenousacquiredcoronary

Related codes at this level

Codes that share I25.4. If I25.41 is not quite right, the correct code is usually one of these.

Questions about I25.41

Is I25.41 a billable ICD-10-CM code?
Yes. I25.41 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I25.41 sit in the tabular list?
Diseases of the circulatory system (I00-I99), in the block Ischemic heart diseases (I20-I25).
What cannot be coded together with I25.41?
I25.41 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.