I45.3Billable

Trifascicular block

Chapter: 9. Diseases of the circulatory system
Category: I45
Effective date: October 1, 2026

Related codes in category I45

I45Other conduction disorders I45.0Right fascicular blockYes I45.1Other and unspecified right bundle-branch block I45.10Unspecified right bundle-branch blockYes I45.19Other right bundle-branch blockYes I45.2Bifascicular blockYes I45.4Nonspecific intraventricular blockYes I45.5Other specified heart blockYes I45.6Pre-excitation syndromeYes I45.8Other specified conduction disorders I45.81Long QT syndromeYes I45.89Other specified conduction disordersYes

Frequently asked questions

What is ICD-10 code I45.3?

I45.3 is an ICD-10-CM diagnosis code for Trifascicular block.

Is I45.3 a billable code?

Yes. I45.3 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is I45.3 in?

I45.3 falls under Chapter 9: Diseases of the circulatory system.

When did I45.3 become effective?

I45.3 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to I45.3?

I45.3 belongs to category I45, which includes 12 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.