I33.9

Applicable To

• Acute endocarditis NOS

• Acute myoendocarditis NOS

• Acute periendocarditis NOS

• Subacute endocarditis NOS

• Subacute myoendocarditis NOS

• Subacute periendocarditis NOS

Approximate Synonyms

• Acute endocarditis

• Acute endocarditis infection of heart valve)

• Acute nonbacterial endocarditis

• Endocarditis infection of heart valve), subacute

• Subacute endocarditis

• Subacute endocarditis infection of heart valve)

Clinical Information

• Acute inflammation of the endocardium. Bacteria is the usual etiologic agent, and the distinction between “acute” and “subacute” has traditionally been made based on the pathogenic organism and clinical presentation.

Details

• I33.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

• The 2023 edition of ICD-10-CM I33.9 became effective on October 1, 2022.

• This is the American ICD-10-CM version of I33.9 – other international versions of ICD-10 I33.9 may differ.