ICD-9 Diagnosis Code 426.13

Av block-2nd degree NEC

Diagnosis Code 426.13

ICD-9: 426.13
Short Description: Av block-2nd degree NEC
Long Description: Other second degree atrioventricular block
This is the 2014 version of the ICD-9-CM diagnosis code 426.13

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.

  • Electrocardiogram: partial atrioventricular block - 2:1
  • High degree second degree atrioventricular block
  • Incomplete atrioventricular block with atrioventricular response
  • Intermittent second degree atrioventricular block
  • Mobitz type I incomplete atrioventricular block
  • Mobitz type I second degree atrioventricular block on electrocardiogram
  • Second degree atrioventricular block

Index of Diseases and Injuries
References found for the code 426.13 in the Index of Diseases and Injuries:

    • Block
      • atrioventricular (AV) (incomplete) (partial) 426.10
        • 2:1 atrioventricular response block 426.13
          • atrioventricular dissociation 426.0
        • second degree (Mobitz type I) 426.13
          • Mobitz (type II) 426.12
        • Mobitz (incomplete)
          • type I (Wenckebach's) 426.13
        • partial 426.13
      • heart 426.9
        • second degree (atrioventricular) 426.13
        • incomplete 426.13
    • Mobitz heart block (atrioventricular) 426.10
      • type I (Wenckebach's) 426.13
    • Phenomenon
      • Wenckebach's, heart block (second degree) 426.13
    • Wenckebach's phenomenon, heart block (second degree) 426.13

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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