ICD-10-CM · FY 2026 APRIL UPDATE
I51
Complications and ill-defined descriptions of heart disease
Diagnosis reference
Nonbillable categoryThis entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.
Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification
Related entries
Up to 30 descendants in this category
| CODE | DESCRIPTION | TYPE |
|---|---|---|
| I51.0 | Cardiac septal defect, acquired | Billable |
| I51.1 | Rupture of chordae tendineae, not elsewhere classified | Billable |
| I51.2 | Rupture of papillary muscle, not elsewhere classified | Billable |
| I51.3 | Intracardiac thrombosis, not elsewhere classified | Billable |
| I51.4 | Myocarditis, unspecified | Billable |
| I51.5 | Myocardial degeneration | Billable |
| I51.7 | Cardiomegaly | Billable |
| I51.8 | Other ill-defined heart diseases | Category |
| I51.81 | Takotsubo syndrome | Billable |
| I51.89 | Other ill-defined heart diseases | Billable |
| I51.9 | Heart disease, unspecified | Billable |
Use the complete reference
This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.
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