Specific code 2009 ICD-9-CM Diagnosis Code 327.11
Idiopathic hypersomnia with long sleep time
  • Short description: IDIO HYPERSOM-LONG SLEEP.
  • ICD-9-CM 327.11 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 327.11 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
  • You are viewing the 2009 version of ICD-9-CM 327.11.
  • More recent version(s) of ICD-9-CM 327.11: 2010 2011 2012 2013 2014 2015.
Disease Synonyms
  • Hypersomnia, idiopathic w long sleep time
  • Idiopathic hypersomnia associated with long sleep time
Convert to ICD-10-CM: 327.11 converts directly to:
  • 2015 ICD-10-CM G47.11 Idiopathic hypersomnia with long sleep time
ICD-9-CM Volume 2 Index entries containing back-references to 327.11:
  • Hypersomnia, unspecified 780.54
    • idiopathic
      • with long sleep time 327.11
      • without long sleep time 327.12
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 327.11 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 2009 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.