I33.9
I33.9: Acute and subacute endocarditis, unspecified
Billable / specific codeICD-10-CM
I33.9 is a billable, specific ICD-10-CM code for acute and subacute endocarditis, unspecified. It is valid for submission on a claim.
Check I33.9 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Acute endocarditis NOS
- Acute myoendocarditis NOS
- Acute periendocarditis NOS
- Subacute endocarditis NOS
- Subacute myoendocarditis NOS
- Subacute periendocarditis NOS
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
I33.9 is named in 8 Medicare coverage policies: 8 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A56500Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A56625Billing and Coding: Echocardiography
- A56781Billing and Coding: Transthoracic Echocardiography (TTE)
Alphabetic index entries that lead here
- Endocarditis›acute or subacute
- Endocarditis›toxic
- Endocarditis›aortic›acute or subacute
- Endocarditis›pulmonary›acute or subacute
- Endocarditis›mitral›nonrheumatic›acute or subacute
- Endocarditis›tricuspid›nonrheumatic›acute or subacute
Code history
Unchanged in every release from FY2024 to FY2027.