ICD-10-CM Code I44.30

Unspecified atrioventricular block

Version 2020 Billable Code

Valid for Submission

I44.30 is a billable code used to specify a medical diagnosis of unspecified atrioventricular block. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code I44.30 might also be used to specify conditions or terms like atrioventricular block, atrioventricular block due to endocarditis, ecg: partial atrioventricular block - 2:1, ecg: partial atrioventricular block - 3:1, ecg: partial atrioventricular block - long pr, partial atrioventricular block, etc

Short Description:Unspecified atrioventricular block
Long Description:Unspecified atrioventricular block

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code I44.30 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Atrioventricular block
  • Atrioventricular block due to endocarditis
  • ECG: partial atrioventricular block - 2:1
  • ECG: partial atrioventricular block - 3:1
  • ECG: partial atrioventricular block - long PR
  • Partial atrioventricular block
  • Postoperative atrioventricular block

Clinical Information

  • ATRIOVENTRICULAR BLOCK-. impaired impulse conduction from heart atria to heart ventricles. av block can mean delayed or completely blocked impulse conduction.

Diagnostic Related Groups

The ICD-10 code I44.30 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.


Convert I44.30 to ICD-9

  • 426.10 - Atriovent block NOS (Approximate Flag)
  • 426.50 - Bundle branch block NOS (Approximate Flag)

Code Classification

  • Diseases of the circulatory system (I00–I99)
    • Other forms of heart disease (I30-I52)
      • Atrioventricular and left bundle-branch block (I44)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


An arrhythmia is a problem with the rate or rhythm of your heartbeat. It means that your heart beats too quickly, too slowly, or with an irregular pattern. When the heart beats faster than normal, it is called tachycardia. When the heart beats too slowly, it is called bradycardia. The most common type of arrhythmia is atrial fibrillation, which causes an irregular and fast heart beat.

Many factors can affect your heart's rhythm, such as having had a heart attack, smoking, congenital heart defects, and stress. Some substances or medicines may also cause arrhythmias.

Symptoms of arrhythmias include

  • Fast or slow heart beat
  • Skipping beats
  • Lightheadedness or dizziness
  • Chest pain
  • Shortness of breath
  • Sweating

Your doctor can run tests to find out if you have an arrhythmia. Treatment to restore a normal heart rhythm may include medicines, an implantable cardioverter-defibrillator (ICD) or pacemaker, or sometimes surgery.

NIH: National Heart, Lung, and Blood Institute

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