I33.0

ICD-10Billable

Acute and subacute infective endocarditis

Official ICD-10-CM descriptor (FY2026)

Acute and subacute infective endocarditis

I33.0 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

  • Bacterial endocarditis (acute) (subacute)
  • Infective endocarditis (acute) (subacute) NOS
  • Endocarditis lenta (acute) (subacute)
  • Malignant endocarditis (acute) (subacute)
  • Purulent endocarditis (acute) (subacute)
  • Septic endocarditis (acute) (subacute)
  • Ulcerative endocarditis (acute) (subacute)
  • Vegetative endocarditis (acute) (subacute)

Use additional code

Report an additional code to identify the associated condition.

  • code (B95-B97) to identify infectious agent

Related codes in I33

Where this code sits

Parent code
I33

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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