I51.89
Other ill-defined heart diseases
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 11 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.-
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 2
I51.89code
Inclusion terms
- Carditis (acute)(chronic)
- Pancarditis (acute)(chronic)
Index entries leading here 10
- Displacement, displaced
- Asynergia, asynergy R27.8
- ventricular I51.89
- Disorder (of) — see also Disease
- cardiac, functional I51.89
- Carditis (acute) (bacterial) (chronic) (subacute) I51.89
- Incompetency, incompetent, incompetence
- Disease, diseased — see also Syndrome
- Dysfunction
- Hyperkinesia, hyperkinetic (disease) (reaction) (syndrome) (childhood) (adolescence) — see also Disorder, attention-deficit hyperactivity
- heart I51.89
- Hemorrhage, hemorrhagic (concealed) R58
- heart I51.89
- Pancarditis (acute) (chronic) I51.89
Alongside this code 1 same parent — I51.8
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.