Emergency: 119
AMDA-IMIC

I33 Acute and subacute endocarditis

Category / Non-billable header 2 subcodes

Block: Other forms of heart disease (I30-I5A)

Excludes 1 (cannot be coded together)

  • acute rheumatic endocarditis (I01.1)
  • endocarditis NOS (I38)

Subcodes

Each subcode links to a detail page with full clinical annotations.

Code Description Billable
I33..0 Acute and subacute infective endocarditis Yes
I33..9 Acute and subacute endocarditis, unspecified Yes

Plain-language term for this code

The following entry in the US Medical Glossary corresponds to ICD-10-CM category I33:

Last reviewed: September 2026