G00–G99
Diseases of the Nervous System
Parkinson's, epilepsy, migraine, neuropathy
G47.11
Idiopathic hypersomnia with long sleep time
Billable
G47.12
Idiopathic hypersomnia without long sleep time
Billable
G47.13
Recurrent hypersomnia
Billable
G47.14
Hypersomnia due to medical condition
Billable
G47.19
Other hypersomnia
Billable
G47.2
Circadian rhythm sleep disorders
Non-billable
G47.20
Circadian rhythm sleep disorder, unspecified type
Billable
G47.21
Circadian rhythm sleep disorder, delayed sleep phase type
Billable
G47.22
Circadian rhythm sleep disorder, advanced sleep phase type
Billable
G47.23
Circadian rhythm sleep disorder, irregular sleep wake type
Billable
G47.24
Circadian rhythm sleep disorder, free running type
Billable
G47.25
Circadian rhythm sleep disorder, jet lag type
Billable
G47.26
Circadian rhythm sleep disorder, shift work type
Billable
G47.27
Circadian rhythm sleep disorder in conditions classified elsewhere
Billable
G47.29
Other circadian rhythm sleep disorder
Billable
G47.3
Sleep apnea
Non-billable
G47.30
Sleep apnea, unspecified
Billable
G47.31
Primary central sleep apnea
Billable
G47.32
High altitude periodic breathing
Billable
G47.33
Obstructive sleep apnea (adult) (pediatric)
Billable
G47.34
Idiopathic sleep related nonobstructive alveolar hypoventilation
Billable
G47.35
Congenital central alveolar hypoventilation syndrome
Billable
G47.36
Sleep related hypoventilation in conditions classified elsewhere
Billable
G47.37
Central sleep apnea in conditions classified elsewhere
Billable
G47.39
Other sleep apnea
Billable
G47.4
Narcolepsy and cataplexy
Non-billable
G47.41
Narcolepsy
Non-billable
G47.411
Narcolepsy with cataplexy
Billable
G47.419
Narcolepsy without cataplexy
Billable
G47.42
Narcolepsy in conditions classified elsewhere
Non-billable
G47.421
Narcolepsy in conditions classified elsewhere with cataplexy
Billable
G47.429
Narcolepsy in conditions classified elsewhere without cataplexy
Billable
G47.5
Parasomnia
Non-billable
G47.50
Parasomnia, unspecified
Billable
G47.51
Confusional arousals
Billable
G47.52
REM sleep behavior disorder
Billable
G47.53
Recurrent isolated sleep paralysis
Billable
G47.54
Parasomnia in conditions classified elsewhere
Billable
G47.59
Other parasomnia
Billable
G47.6
Sleep related movement disorders
Non-billable
G47.61
Periodic limb movement disorder
Billable
G47.62
Sleep related leg cramps
Billable
G47.63
Sleep related bruxism
Billable
G47.69
Other sleep related movement disorders
Billable
G47.8
Other sleep disorders
Billable
G47.9
Sleep disorder, unspecified
Billable
G50
Disorders of trigeminal nerve
Non-billable
G50.0
Trigeminal neuralgia
Billable
G50.1
Atypical facial pain
Billable
G50.8
Other disorders of trigeminal nerve
Billable
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