Specific code 2014 ICD-9-CM Diagnosis Code 426.12
Mobitz (type) II atrioventricular block
  • Billable Code
  • Short description: Atrioven block-mobitz ii.
  • ICD-9-CM 426.12 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 426.12 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Atrioventricular block, Mobitz type 2
  • AV block, Mobitz type 2
  • Mobitz type II atrioventricular block
Clinical Information
  • A cardiac rhythm characterized by a regular sinus/atrial rhythm with intermittent nonconducted p waves. There is a constant pr interval in the conducted beats.
  • A disorder characterized by a dysrhythmia with relatively constant pr interval prior to the block of an atrial impulse. This is the result of intermittent failure of atrial electrical impulse conduction through the atrioventricular (av) node to the ventricles.
  • Intermittent failure of atrial electrical impulse conduction through the atrioventricular (av) node to the ventricles, characterized by a relatively constant pr interval prior to the block of an atrial impulse.
Applies To
  • Incomplete atrioventricular block:
    • Mobitz (type) II
    • second degree, Mobitz (type) II
Convert to ICD-10-CM: 426.12 converts approximately to:
  • 2014 ICD-10-CM I44.1 Atrioventricular block, second degree
ICD-9-CM Volume 2 Index entries containing back-references to 426.12:
  • Block
    • atrioventricular (AV) (incomplete) (partial) 426.10
      • with
      • 2:1 atrioventricular response block 426.13
        • atrioventricular dissociation 426.0
      • first degree (incomplete) 426.11
      • second degree (Mobitz type I) 426.13
        • Mobitz (type II) 426.12
      • third degree 426.0
      • complete 426.0
      • congenital 746.86
      • Mobitz (incomplete)
        • type I (Wenckebach's) 426.13
        • type II 426.12
      • partial 426.13
  • Mobitz heart block (atrioventricular) 426.10
    • type II 426.12
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 426.12 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.