I33.0
Acute and subacute infective endocarditis
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 12 never code together
I00-I99chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
- systemic connective tissue disorders (M30-M36)M30-M36
- transient cerebral ischemic attacks and related syndromes (G45.-)G45.-
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 9
I33.0code
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)
Index entries leading here 12
- Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) I38
- mitral (chronic) (double) (fibroid) (heart) (inactive) (valve) (with chorea) I05.9
- acute or subacute I33.9
- infective I33.0
- bacterial (acute) (any valve) (subacute) I33.0
- constrictive I33.0
- due to
- Serratia marcescens I33.0
- pneumococcal (acute) (any valve) (subacute) I33.0
- infectious or infective (acute) (any valve) (subacute) I33.0
- lenta (acute) (any valve) (subacute) I33.0
- malignant (acute) (any valve) (subacute) I33.0
- mycotic (acute) (any valve) (subacute) I33.0
- purulent (acute) (any valve) (subacute) I33.0
- septic (acute) (any valve) (subacute) I33.0
- streptococcal (acute) (any valve) (subacute) I33.0
- suppurative (acute) (any valve) (subacute) I33.0
- ulcerative (acute) (any valve) (subacute) I33.0
- vegetative (acute) (any valve) (subacute) I33.0
- Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) I72.9
- Arthropathy M12.9
- Disorder (of) — see also Disease
- Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic) N05.9
- due to
- subacute bacterial endocarditis I33.0
- due to
- Vegetation, vegetative
- Infection, infected, infective (opportunistic) B99.9
- endocardium I33.0
- Glomerulonephritis N05.9
- in (due to)
- subacute bacterial endocarditis I33.0
- in (due to)
- Node (s) — see also Nodule
- Osler's I33.0
- Osler's nodes I33.0
- SBE (subacute bacterial endocarditis) I33.0
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- valve, heart I33.0
Alongside this code 1 same parent — I33
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.