Specific code 2014 ICD-9-CM Diagnosis Code 255.12
Conn's syndrome
  • Billable Code
  • ICD-9-CM 255.12 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 255.12 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Conn syndrome
  • Conns syndrome
Clinical Information
  • An endocrine disorder characterized by excessive production of aldosterone by the adrenal glands. Causes include adrenal gland adenoma and adrenal gland hyperplasia. The overproduction of aldosterone results in sodium and water retention and hypokalemia. Patients present with high blood pressure, muscle weakness, and headache.
  • Overproduction of aldosterone by an adrenal cortical adenoma, characterized typically by low potassium levels, underacidity of the body, muscular weakness, excess urination, excess thirst, and high blood pressure.
  • Primary hyperaldosteronism caused by the excess production of aldosterone by an adenoma of the zona glomerulosa or conn adenoma.
Convert to ICD-10-CM: 255.12 converts directly to:
  • 2014 ICD-10-CM E26.01 Conn's syndrome
ICD-9-CM Volume 2 Index entries containing back-references to 255.12:
  • Conn (-Louis) syndrome (primary aldosteronism) 255.12
  • Syndrome - see also Disease
    • Conn (-Louis) (primary aldosteronism) 255.12
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 255.12 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.