Specific code 2015 ICD-9-CM Diagnosis Code 255.12
Conn's syndrome
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 255.12 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 255.12 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 255.12 converts directly to:
  • 2015/16 ICD-10-CM E26.01 Conn's syndrome
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
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 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.