ICD-9 Diagnosis Code 426.53

Bilat bb block NEC

Diagnosis Code 426.53

ICD-9: 426.53
Short Description: Bilat bb block NEC
Long Description: Other bilateral bundle branch block
This is the 2014 version of the ICD-9-CM diagnosis code 426.53

Code Classification
  • Diseases of the circulatory system (390–459)
    • Other forms of heart disease (420-429)
      • 426 Conduction disorders

Information for Medical Professionals

Convert to ICD-10 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Anterior fascicular block, posterior fascicular block AND incomplete right bundle branch block
  • Bifascicular block
  • Bifascicular block on electrocardiogram
  • Bilateral bundle branch block
  • Right branch block, incomplete anterior fascicular block AND incomplete posterior fascicular block
  • Right bundle branch block AND incomplete left bundle branch block
  • Right bundle branch block with left bundle branch block
  • Right bundle branch block, anterior fascicular block AND incomplete posterior fascicular block

Index of Diseases and Injuries
References found for the code 426.53 in the Index of Diseases and Injuries:

    • Block
      • bifascicular (cardiac) 426.53
      • bundle branch (complete) (false) (incomplete) 426.50
        • bilateral 426.53
        • left (complete) (main stem) 426.3
          • with right bundle branch block 426.53
          • incomplete 426.2
            • with right bundle branch block 426.53
        • right 426.4
          • with
            • left bundle branch block (incomplete) (main stem) 426.53
            • left fascicular block 426.53
              • anterior 426.52
              • posterior 426.51
      • heart 426.9
        • bundle branch (complete) (false) (incomplete) 426.50
          • bilateral 426.53
      • intraventricular (diffuse) (myofibrillar) 426.6
        • bundle branch (complete) (false) (incomplete) 426.50
          • bilateral 426.53
    • Bundle
      • branch block (complete) (false) (incomplete) 426.50
        • bilateral 426.53

Information for Patients


Also called: Irregular heartbeat

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

  • Arrhythmias
  • Atrial fibrillation or flutter
  • Cardiac ablation procedures
  • Cardioversion
  • Ectopic heartbeat
  • Electrocardiogram
  • Exercise stress test
  • Heart block
  • Heart palpitations
  • His bundle electrography
  • Holter monitor (24h)
  • Intracardiac electrophysiology study (EPS)
  • Multifocal atrial tachycardia
  • Paroxysmal supraventricular tachycardia (PSVT)
  • Sick sinus syndrome
  • Ventricular fibrillation
  • Ventricular tachycardia
  • Wolff-Parkinson-White syndrome

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