ICD-10-CM code · FY2027
I51 Complications and ill-defined descriptions of heart disease
Header codeNot billable: use one of the 10 billable codes below
About I51
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Coding notes for I51
Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.
Chapter 9 notes (apply to every code in it)
Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
Codes under I51 11
- I51.0 Cardiac septal defect, acquiredBillable
- I51.1 Rupture of chordae tendineae, not elsewhere classifiedBillable
- I51.2 Rupture of papillary muscle, not elsewhere classifiedBillable
- I51.3 Intracardiac thrombosis, not elsewhere classifiedBillable
- I51.4 Myocarditis, unspecifiedBillable
- I51.5 Myocardial degenerationBillable
- I51.7 CardiomegalyBillable
- I51.8 Other ill-defined heart diseasesHeader
- I51.81 Takotsubo syndromeBillable
- I51.89 Other ill-defined heart diseasesBillable
- I51.9 Heart disease, unspecifiedBillable
Other categories in I30-I5A
- I30 Acute pericarditisHeader
- I31 Other diseases of pericardiumHeader
- I32 Pericarditis in diseases classified elsewhereBillable
- I33 Acute and subacute endocarditisHeader
- I34 Nonrheumatic mitral valve disordersHeader
- I35 Nonrheumatic aortic valve disordersHeader
- I36 Nonrheumatic tricuspid valve disordersHeader
- I37 Nonrheumatic pulmonary valve disordersHeader
- I38 Endocarditis, valve unspecifiedBillable
- I39 Endocarditis and heart valve disorders in diseases classified elsewhereBillable
- I40 Acute myocarditisHeader
- I41 Myocarditis in diseases classified elsewhereBillable
- I42 CardiomyopathyHeader
- I43 Cardiomyopathy in diseases classified elsewhereBillable
- I44 Atrioventricular and left bundle-branch blockHeader
- I45 Other conduction disordersHeader
- I46 Cardiac arrestHeader
- I47 Paroxysmal tachycardiaHeader
- I48 Atrial fibrillation and flutterHeader
- I49 Other cardiac arrhythmiasHeader
- I50 Heart failureHeader
- I52 Other heart disorders in diseases classified elsewhereBillable
- I5A Non-ischemic myocardial injury (non-traumatic)Billable
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See 2MM+ plansICD-10-CM FY2027 code set, as published by the CDC National Center for Health Statistics (NCHS) and CMS, effective October 1, 2026 to September 30, 2027. Codes, titles and notes are shown as published. Check payer rules and the official guidelines before billing. This page is not medical advice.
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