ICD-10-CM category
I51: Complications and ill-defined descriptions of heart disease
Codes under I51 (Complications and ill-defined descriptions of heart disease). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| I51.0 | Cardiac septal defect, acquired | ✓ |
| I51.1 | Rupture of chordae tendineae, not elsewhere classified | ✓ |
| I51.2 | Rupture of papillary muscle, not elsewhere classified | ✓ |
| I51.3 | Intracardiac thrombosis, not elsewhere classified | ✓ |
| I51.4 | Myocarditis, unspecified | ✓ |
| I51.5 | Myocardial degeneration | ✓ |
| I51.7 | Cardiomegaly | ✓ |
| I51.8 | Other ill-defined heart diseases | — |
| I51.9 | Heart disease, unspecified | ✓ |
| I51.81 | Takotsubo syndrome | ✓ |
| I51.89 | Other ill-defined heart diseases | ✓ |
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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