| I479 | Paroxysmal tachycardia, unspecified |
| I48 | Atrial fibrillation and flutter |
| I480 | Paroxysmal atrial fibrillation |
| I481 | Persistent atrial fibrillation |
| I4811 | Longstanding persistent atrial fibrillation |
| I4819 | Other persistent atrial fibrillation |
| I482 | Chronic atrial fibrillation |
| I4820 | Chronic atrial fibrillation, unspecified |
| I4821 | Permanent atrial fibrillation |
| I483 | Typical atrial flutter |
| I484 | Atypical atrial flutter |
| I489 | Unspecified atrial fibrillation and atrial flutter |
| I4891 | Unspecified atrial fibrillation |
| I4892 | Unspecified atrial flutter |
| I49 | Other cardiac arrhythmias |
| I490 | Ventricular fibrillation and flutter |
| I4901 | Ventricular fibrillation |
| I4902 | Ventricular flutter |
| I491 | Atrial premature depolarization |
| I492 | Junctional premature depolarization |
| I493 | Ventricular premature depolarization |
| I494 | Other and unspecified premature depolarization |
| I4940 | Unspecified premature depolarization |
| I4949 | Other premature depolarization |
| I495 | Sick sinus syndrome |
| I498 | Other specified cardiac arrhythmias |
| I499 | Cardiac arrhythmia, unspecified |
| I50 | Heart failure |
| I501 | Left ventricular failure, unspecified |
| I502 | Systolic (congestive) heart failure |
| I5020 | Unspecified systolic (congestive) heart failure |
| I5021 | Acute systolic (congestive) heart failure |
| I5022 | Chronic systolic (congestive) heart failure |
| I5023 | Acute on chronic systolic (congestive) heart failure |
| I503 | Diastolic (congestive) heart failure |
| I5030 | Unspecified diastolic (congestive) heart failure |
| I5031 | Acute diastolic (congestive) heart failure |
| I5032 | Chronic diastolic (congestive) heart failure |
| I5033 | Acute on chronic diastolic (congestive) heart failure |
| I504 | Combined systolic (congestive) and diastolic (congestive) heart failure |
| I5040 | Unspecified combined systolic (congestive) and diastolic (congestive) heart failure |
| I5041 | Acute combined systolic (congestive) and diastolic (congestive) heart failure |
| I5042 | Chronic combined systolic (congestive) and diastolic (congestive) heart failure |
| I5043 | Acute on chronic combined systolic (congestive) and diastolic (congestive) heart failure |
| I508 | Other heart failure |
| I5081 | Right heart failure |
| I50810 | Right heart failure, unspecified |
| I50811 | Acute right heart failure |
| I50812 | Chronic right heart failure |
| I50813 | Acute on chronic right heart failure |