2026 ICD-10-CM Diagnosis Code I45Other conduction disorders

ICD-10-CM Codes›I00–I99›I30-I5A›I45

ICD-10-CM I45
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I45 is a non-billable ICD-10-CM category code for other conduction disorders, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I45.0, I45.10, I45.19, and I45.2.

Code Identity

ICD-10-CM Code
I45
Billable Status
No — Non-Billable Category
Code Describes
Other conduction disorders
Chapter
I30-I5A
Other forms of heart disease

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI30-I5AOther forms of heart disease
CategoryI45Other conduction disorders
This CodeI45Other conduction disorders

Specific Coding for Other conduction disordersOverview

Non-specific codes like I45 require more characters. Use one of these billable codes instead:

  • Use I45.0 for Right fascicular block

  • I45.1 for Other and unspecified right bundle-branch block

  • Use I45.10 for Unspecified right bundle-branch block

  • Use I45.19 for Other right bundle-branch block

  • Use I45.2 for Bifascicular block

  • Use I45.3 for Trifascicular block

  • Use I45.4 for Nonspecific intraventricular block

  • Use I45.5 for Other specified heart block

  • Use I45.6 for Pre-excitation syndrome

  • I45.8 for Other specified conduction disorders

  • Use I45.81 for Long QT syndrome

  • Use I45.89 for Other specified conduction disorders

  • Use I45.9 for Conduction disorder, unspecified

Patient EducationClinical

Arrhythmia

An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias.

The full article covers:

  • What is an arrhythmia?
  • What causes an arrhythmia?
  • What are the symptoms of an arrhythmia?
  • How is an arrhythmia diagnosed?
  • What are the treatments for an arrhythmia?
  • Can arrhythmias be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I45Overview

Is I45 (Other conduction disorders) a billable code?

No. This is a category header that groups the codes for other conduction disorders, and headers cannot be submitted on claims. Claims for other conduction disorders need a more specific code from this category, such as I45.0, I45.10, and I45.19.