I45.3: Trifascicular block
I45.3 is the billable ICD-10-CM diagnosis code for Trifascicular block. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code I45.3?
I45.3 is the ICD-10-CM diagnosis code for Trifascicular block. It belongs to category I45 (Other conduction disorders).
Is I45.3 a billable code?
Yes. I45.3 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does I45.3 belong to?
I45.3 is part of ICD-10-CM category I45 — Other conduction disorders, which has 22 billable codes.
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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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