I40.9

I40.9: Acute myocarditis, unspecified

Billable / specific codeICD-10-CM

I40.9 is a billable, specific ICD-10-CM code for acute myocarditis, unspecified. It is valid for submission on a claim.

Check I40.9 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above I40.9

A category’s note binds every code beneath it.

Written on I40: Acute myocarditis

acute rheumatic myocarditis (I01.2)

Other codes that can never be billed with I40.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

I51.4Myocarditis, unspecified

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

I40.9 is named in 9 Medicare coverage policies: 9 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
A56432Billing and Coding: Infliximab
A56500Billing and Coding: Cardiac Catheterization and Coronary Angiography
A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax

Alphabetic index entries that lead here

Myocarditis›active
Myocarditis›acute or subacute(interstitial)
Myocarditis›nonrheumatic, active
Myocarditis›parenchymatous
Rupture, ruptured›cardiac›infectional

Code history

Unchanged in every release from FY2024 to FY2027.