Specific code 2011 ICD-9-CM Diagnosis Code 327.39
Other circadian rhythm sleep disorder
  • Short description: Circadian rhym sleep NEC.
  • ICD-9-CM 327.39 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 327.39 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
  • You are viewing the 2011 version of ICD-9-CM 327.39.
  • More recent version(s) of ICD-9-CM 327.39: 2012 2013 2014.
Disease Synonyms
  • Reversed sleep-wake cycle (disorder)
  • Sleep disorder, circadian rhythm, reversed
  • Sleep wake cycle, reversed
Convert to ICD-10-CM: 327.39 converts directly to:
  • 2014 ICD-10-CM G47.29 Other circadian rhythm sleep disorder
ICD-9-CM Volume 2 Index entries containing back-references to 327.39:
  • Disorder - see also Disease
    • sleep 780.50
      • with apnea - see Apnea, sleep
      • alcohol induced 291.82
      • arousal 307.46
      • circadian rhythm 327.30
      • drug induced 292.85
      • initiation or maintenance (see also Insomnia) 780.52
      • nonorganic origin 307.40
      • organic specified type NEC 327.8
      • periodic limb movement 327.51
      • specified NEC 780.59
      • wake
        • cycle - see Disorder, sleep, circadian rhythm
        • schedule - see Disorder, sleep, circadian rhythm
  • Inversion
    • sleep rhythm 327.39
  • Irregular, irregularity
    • sleep-wake rhythm (non-24-hour) 327.39
  • Rhythm
    • sleep, inversion 327.39
  • Sleep
    • rhythm inversion 327.39
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 327.39 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 2011 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.