I33.0

Acute and subacute infective endocarditis

Billable / specific

I33.0 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

  • 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)

Excludes1

Not coded here — never report together with this code.

  • acute rheumatic endocarditis (I01.1) (from I33)
  • endocarditis NOS (I38) (from I33)

Excludes2

Not included here — may be reported together when both conditions exist.

  • certain conditions originating in the perinatal period (P04-P96) (from I33)
  • certain infectious and parasitic diseases (A00-B99) (from I33)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A) (from I33)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) (from I33)
  • endocrine, nutritional and metabolic diseases (E00-E88) (from I33)
  • injury, poisoning and certain other consequences of external causes (S00-T88) (from I33)
  • neoplasms (C00-D49) (from I33)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from I33)
  • systemic connective tissue disorders (M30-M36) (from I33)
  • transient cerebral ischemic attacks and related syndromes (G45.-) (from I33)

Use additional code

Add a code to identify the following, if applicable.

  • code (B95-B97) to identify infectious agent

Also known as

  • 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)
  • Aneurysm, endocardial, infective
  • Aneurysm, infective, endocardial
  • Aneurysm, mycotic, endocardial
  • Arthropathy, in infective endocarditis
  • Arthropathy, reactive, in infective endocarditis
  • Disorder, glomerular, subacute bacterial endocarditis
  • Endocarditis, acute or subacute, infective
  • Endocarditis, bacterial
  • Endocarditis, constrictive
  • Endocarditis, due to Serratia marcescens
  • Endocarditis, infectious or infective
  • Endocarditis, lenta
  • Endocarditis, malignant
  • Endocarditis, mitral, active or acute, bacterial
  • Endocarditis, mycotic

Parent code

  • I33Acute and subacute endocarditisHeader

Related codes

  • I33.9Acute and subacute endocarditis, unspecifiedBillable

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