I45: Other conduction disorders
Codes under I45 (Other conduction disorders). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| I45.0 | Right fascicular block | ✓ |
| I45.0 | Right fascicular block | ✓ |
| I45.1 | Other and unspecified right bundle-branch block | — |
| I45.1 | Other and unspecified right bundle-branch block | — |
| I45.2 | Bifascicular block | ✓ |
| I45.2 | Bifascicular block | ✓ |
| I45.3 | Trifascicular block | ✓ |
| I45.3 | Trifascicular block | ✓ |
| I45.4 | Nonspecific intraventricular block | ✓ |
| I45.4 | Nonspecific intraventricular block | ✓ |
| I45.5 | Other specified heart block | ✓ |
| I45.5 | Other specified heart block | ✓ |
| I45.6 | Pre-excitation syndrome | ✓ |
| I45.6 | Pre-excitation syndrome | ✓ |
| I45.8 | Other specified conduction disorders | — |
| I45.8 | Other specified conduction disorders | — |
| I45.9 | Conduction disorder, unspecified | ✓ |
| I45.9 | Conduction disorder, unspecified | ✓ |
| I45.10 | Unspecified right bundle-branch block | ✓ |
| I45.10 | Unspecified right bundle-branch block | ✓ |
| I45.19 | Other right bundle-branch block | ✓ |
| I45.19 | Other right bundle-branch block | ✓ |
| I45.81 | Long QT syndrome | ✓ |
| I45.81 | Long QT syndrome | ✓ |
| I45.89 | Other specified conduction disorders | ✓ |
| I45.89 | Other specified conduction disorders | ✓ |
Frequently asked questions
What is ICD-10-CM code I45?
I45 is an ICD-10-CM category covering Other conduction disorders. It contains 26 more specific diagnosis codes, 22 of which are billable.
Is I45 a billable code?
No — I45 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example I45.0 — Right fascicular block). 22 of the 26 codes under I45 are billable.
What codes fall under I45?
I45 includes I45.0, I45.0, I45.1, I45.1, I45.2, plus 21 more. See the full list with descriptions and billable status above.
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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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