2027 ICD-10-CM Diagnosis Code I45Other conduction disorders

ICD-10-CM Codes›I00–I99›I30-I5A›I45

ICD-10-CM I45
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Other conduction disorders
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I45: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

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?
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  • How is an arrhythmia diagnosed?
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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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I45Overview

What is the ICD-10 code for other conduction disorders?

I45 is the ICD-10-CM category for other conduction disorders, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.