Specific code 2014 ICD-9-CM Diagnosis Code 746.82
Cor triatriatum
  • Billable Code
  • ICD-9-CM 746.82 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 746.82 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • COR TRIATRIATUM
  • Cor triatriatum, dexter
  • Cor triatriatum, left sided
  • Cor triatriatum, right sided
  • Cor triatriatum, sinister
  • Divided left atrium
  • Divided right atrium
Clinical Information
  • A malformation of the heart in which the embryonic common pulmonary vein was not incorporated into the left atrium leaving behind a perforated fibromuscular membrane bisecting the left atrium, a three-atrium heart. The opening between the two left atrium sections determines the degree of obstruction to pulmonary venous return, pulmonary venous and pulmonary arterial hypertension.
  • A rare congenital abnormality of the heart characterized by the presence of three atria. The right or left atrium is divided into two parts by fibromuscular tissue or a membrane. It may be associated with other heart congenital abnormalities.
Convert to ICD-10-CM: 746.82 converts directly to:
  • 2014 ICD-10-CM Q24.2 Cor triatriatum
ICD-9-CM Volume 2 Index entries containing back-references to 746.82:
  • Cor
    • triatriatum, triatrium 746.82
  • Double
    • auricle (heart) 746.82
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 746.82 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.