• 327.0
  Organic disorders of initiating and maintaining sleep [Organic insomnia]
• 327.00
  Organic insomnia, unspecified
• 327.01
  Insomnia due to medical condition classified elsewhere
• 327.02
  Insomnia due to mental disorder
• 327.09
  Other organic insomnia
• 327.1
  Organic disorder of excessive somnolence [Organic hypersomnia]
• 327.10
  Organic hypersomnia, unspecified
• 327.11
  Idiopathic hypersomnia with long sleep time
• 327.12
  Idiopathic hypersomnia without long sleep time
• 327.13
  Recurrent hypersomnia
• 327.14
  Hypersomnia due to medical condition classified elsewhere
• 327.15
  Hypersomnia due to mental disorder
• 327.19
  Other organic hypersomnia
• 327.2
  Organic sleep apnea
• 327.20
  Organic sleep apnea, unspecified
• 327.21
  Primary central sleep apnea
• 327.22
  High altitude periodic breathing
• 327.23
  Obstructive sleep apnea (adult) (pediatric)
• 327.24
  Idiopathic sleep related nonobstructive alveolar hypoventilation
• 327.25
  Congenital central alveolar hypoventilation syndrome
• 327.26
  Sleep related hypoventilation/hypoxemia in conditions classifiable elsewhere
• 327.27
  Central sleep apnea in conditions classified elsewhere
• 327.29
  Other organic sleep apnea
• 327.3
  Circadian rhythm sleep disorder
• 327.30
  Circadian rhythm sleep disorder, unspecified
• 327.31
  Circadian rhythm sleep disorder, delayed sleep phase type
• 327.32
  Circadian rhythm sleep disorder, advanced sleep phase type
• 327.33
  Circadian rhythm sleep disorder, irregular sleep-wake type
• 327.34
  Circadian rhythm sleep disorder, free-running type
• 327.35
  Circadian rhythm sleep disorder, jet lag type
• 327.36
  Circadian rhythm sleep disorder, shift work type
• 327.37
  Circadian rhythm sleep disorder in conditions classified elsewhere
• 327.39
  Other circadian rhythm sleep disorder
• 327.4
  Organic parasomnia
• 327.40
  Organic parasomnia, unspecified
• 327.41
  Confusional arousals
• 327.42
  REM sleep behavior disorder
• 327.43
  Recurrent isolated sleep paralysis
• 327.44
  Parasomnia in conditions classified elsewhere
• 327.49
  Other organic parasomnia
• 327.5
  Organic sleep related movement disorders
• 327.51
  Periodic limb movement disorder
• 327.52
  Sleep related leg cramps
• 327.53
  Sleep related bruxism
• 327.59
  Other organic sleep related movement disorders
• 327.8
  Other organic sleep disorders

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