Specific code 2014 ICD-9-CM Diagnosis Code 426.9
Conduction disorder, unspecified
  • Billable Code
  • Short description: Conduction disorder NOS.
  • ICD-9-CM 426.9 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 426.9 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Clinical Information
  • A disorder affecting the conduction system that sends electrical signals in the myocardium.
  • A disorder characterized by pathological irregularities in the cardiac conduction system.
  • Abnormality in rhythm of heartbeat, including rate, regularity, and/or sequence of activation abnormalities
  • An impairment of transmission of the cardiac electrical impulse along the fibers normally responsible impulse propagation.
  • Impairment of conduction in heart excitation; often applied specifically to atrioventricular heart block.
Applies To
  • Heart block NOS
  • Stokes-Adams syndrome
Convert to ICD-10-CM: 426.9 converts directly to:
  • 2014 ICD-10-CM I45.9 Conduction disorder, unspecified
ICD-9-CM Volume 2 Index entries containing back-references to 426.9:
  • Adams-Stokes (-Morgagni) disease or syndrome (syncope with heart block) 426.9
  • Arrhythmia (auricle) (cardiac) (cordis) (gallop rhythm) (juvenile) (nodal) (reflex) (sinus) (supraventricular) (transitory) (ventricle) 427.9
    • block 426.9
  • Block
    • arrhythmic 426.9
    • cardiac 426.9
    • conduction 426.9
    • heart 426.9
      • first degree (atrioventricular) 426.11
      • second degree (atrioventricular) 426.13
      • third degree (atrioventricular) 426.0
      • bundle branch (complete) (false) (incomplete) 426.50
        • bilateral 426.53
        • left (see also Block, bundle branch, left) 426.3
        • right (see also Block, bundle branch, right) 426.4
      • complete (atrioventricular) 426.0
      • congenital 746.86
      • incomplete 426.13
      • intra-atrial 426.6
      • intraventricular NEC 426.6
      • sinoatrial 426.6
      • specified type NEC 426.6
    • myocardial (see also Block, heart) 426.9
  • Defect, defective 759.9
    • conduction (heart) 426.9
      • bone (see also Deafness, conductive) 389.00
  • Delay, delayed
    • conduction (cardiac) (ventricular) 426.9
  • Disease, diseased - see also Syndrome
    • Adams-Stokes (-Morgagni) (syncope with heart block) 426.9
    • Morgagni-Adams-Stokes (syncope with heart block) 426.9
    • Stokes-Adams (syncope with heart block) 426.9
  • Disorder - see also Disease
    • conduction, heart 426.9
  • Morgagni-Adams-Stokes syndrome (syncope with heart block) 426.9
  • Spens' syndrome (syncope with heart block) 426.9
  • Stokes-Adams syndrome (syncope with heart block) 426.9
  • Syndrome - see also Disease
    • Adams-Stokes (-Morgagni) (syncope with heart block) 426.9
    • Morgagni-Adams-Stokes (syncope with heart block) 426.9
    • Spens' (syncope with heart block) 426.9
    • Stokes (-Adams) (syncope with heart block) 426.9
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 426.9 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.