I51 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Complications and ill-defined descriptions of heart disease.
Heart disease specified as rheumatic (I00-I09)
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Cardiac septal defect, acquired
Rupture of chordae tendineae, not elsewhere classified
Rupture of papillary muscle, not elsewhere classified
Intracardiac thrombosis, not elsewhere classified
Myocarditis, unspecified
Myocardial degeneration
Cardiomegaly
Other ill-defined heart diseases
Heart disease, unspecified
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