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  5. Sleep disorders (G47)

Sleep disorders (G47)

ICD-10 code G47 covers a variety of sleep disorders, including insomnia, hypersomnia, circadian rhythm sleep disorders, sleep apnea, narcolepsy, parasomnias, and sleep-related movement disorders. Each specific code in this section defines distinct sleep conditions for precise medical diagnosis and documentation.

This section of ICD-10 codes is used to classify disorders affecting sleep patterns, quality, and regulation. For example, the ICD-10 code for insomnia includes subcodes such as G47.00 for unspecified insomnia; covering terms like "late insomnia" or "initial insomnia"; and G47.01 for insomnia due to medical conditions. Hypersomnia codes (G47.10 to G47.19) capture excessive sleepiness problems, including idiopathic hypersomnia and recurrent hypersomnia, sometimes called Kleine-Levin syndrome. Circadian rhythm sleep disorders (G47.20–G47.29) address disruptions like delayed sleep phase or jet lag, also known as sleep-wake schedule disorders. Sleep apnea variants (G47.30–G47.39) include obstructive and central apnea types, with synonyms like "breathing-related sleep disorder." Narcolepsy codes (G47.41 and beyond) distinguish between narcolepsy with cataplexy and without. Parasomnias (G47.5x) cover abnormal behaviors during sleep such as REM sleep behavior disorder and sleep paralysis. Lastly, sleep-related movement disorders (G47.6x) document conditions like periodic limb movements and bruxism. Using these specific ICD-10 codes aids accurate reporting and supports targeted treatment strategies for diverse sleep-related conditions.

  • Diseases of the nervous system (G00–G99)

    • Episodic and paroxysmal disorders (G40-G47)

        • Sleep disorders (G47)

        • G47 Sleep disorders
        • G47.0 Insomnia
        • G47.00 Insomnia, unspecified
        • G47.01 Insomnia due to medical condition
        • G47.09 Other insomnia
        • G47.1 Hypersomnia
        • G47.10 Hypersomnia, unspecified
        • G47.11 Idiopathic hypersomnia with long sleep time
        • G47.12 Idiopathic hypersomnia without long sleep time
        • G47.13 Recurrent hypersomnia
        • G47.14 Hypersomnia due to medical condition
        • G47.19 Other hypersomnia
        • G47.2 Circadian rhythm sleep disorders
        • G47.20 Circadian rhythm sleep disorder, unspecified type
        • G47.21 Circadian rhythm sleep disorder, delayed sleep phase type
        • G47.22 Circadian rhythm sleep disorder, advanced sleep phase type
        • G47.23 Circadian rhythm sleep disorder, irregular sleep wake type
        • G47.24 Circadian rhythm sleep disorder, free running type
        • G47.25 Circadian rhythm sleep disorder, jet lag type
        • G47.26 Circadian rhythm sleep disorder, shift work type
        • G47.27 Circadian rhythm sleep disorder in conditions classified elsewhere
        • G47.29 Other circadian rhythm sleep disorder
        • G47.3 Sleep apnea
        • G47.30 Sleep apnea, unspecified
        • G47.31 Primary central sleep apnea
        • G47.32 High altitude periodic breathing
        • G47.33 Obstructive sleep apnea (adult) (pediatric)
        • G47.34 Idiopathic sleep related nonobstructive alveolar hypoventilation
        • G47.35 Congenital central alveolar hypoventilation syndrome
        • G47.36 Sleep related hypoventilation in conditions classified elsewhere
        • G47.37 Central sleep apnea in conditions classified elsewhere
        • G47.39 Other sleep apnea
        • G47.4 Narcolepsy and cataplexy
        • G47.41 Narcolepsy
        • G47.411 Narcolepsy with cataplexy
        • G47.419 Narcolepsy without cataplexy
        • G47.42 Narcolepsy in conditions classified elsewhere
        • G47.421 Narcolepsy in conditions classified elsewhere with cataplexy
        • G47.429 Narcolepsy in conditions classified elsewhere without cataplexy
        • G47.5 Parasomnia
        • G47.50 Parasomnia, unspecified
        • G47.51 Confusional arousals
        • G47.52 REM sleep behavior disorder
        • G47.53 Recurrent isolated sleep paralysis
        • G47.54 Parasomnia in conditions classified elsewhere
        • G47.59 Other parasomnia
        • G47.6 Sleep related movement disorders
        • G47.61 Periodic limb movement disorder
        • G47.62 Sleep related leg cramps
        • G47.63 Sleep related bruxism
        • G47.69 Other sleep related movement disorders
        • G47.8 Other sleep disorders
        • G47.9 Sleep disorder, unspecified

Instructional Notations

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Bruxism

A disorder characterized by grinding and clenching of the teeth.

Cataplexy

A condition characterized by transient weakness or paralysis of somatic musculature triggered by an emotional stimulus or physical exertion. Cataplexy is frequently associated with NARCOLEPSY. During a cataplectic attack, there is a marked reduction in muscle tone similar to the normal physiologic hypotonia that accompanies rapid eye movement sleep (SLEEP, REM). (From Adams et al., Principles of Neurology, 6th ed, p396)

Circadian Rhythm

The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs or environmental and physiological stimuli.

Hypercapnia

A clinical manifestation of abnormal increase in the amount of carbon dioxide in arterial blood.

Idiopathic Hypersomnia

A sleep disorder of central nervous system origin characterized by prolonged nocturnal sleep and periods of daytime drowsiness. Affected individuals experience difficulty with awakening in the morning and may have associated sleep drunkenness, automatic behaviors, and memory disturbances. This condition differs from narcolepsy in that daytime sleep periods are longer, there is no association with CATAPLEXY, and the multiple sleep latency onset test does not record sleep-onset rapid eye movement sleep. (From Chokroverty, Sleep Disorders Medicine, 1994, pp319-20; Psychiatry Clin Neurosci 1998 Apr:52(2):125-129)

Narcolepsy

A condition characterized by recurrent episodes of daytime somnolence and lapses in consciousness (microsomnias) that may be associated with automatic behaviors and AMNESIA. CATAPLEXY; SLEEP PARALYSIS, and hypnagogic HALLUCINATIONS frequently accompany narcolepsy. The pathophysiology of this disorder includes sleep-onset rapid eye movement (REM) sleep, which normally follows stage III or IV sleep. (From Neurology 1998 Feb;50(2 Suppl 1):S2-S7)

REM Sleep Behavior Disorder

A disorder characterized by episodes of vigorous and often violent motor activity during REM sleep (SLEEP, REM). The affected individual may inflict self injury or harm others, and is difficult to awaken from this condition. Episodes are usually followed by a vivid recollection of a dream that is consistent with the aggressive behavior. This condition primarily affects adult males. (From Adams et al., Principles of Neurology, 6th ed, p393)

Respiratory Rate

The number of times an organism breathes with the lungs (RESPIRATION) per unit time, usually per minute.

Sleep Bruxism

A sleep disorder characterized by grinding and clenching of the teeth and forceful lateral or protrusive jaw movements. Sleep bruxism may be associated with TOOTH INJURIES; TEMPOROMANDIBULAR JOINT DISORDERS; sleep disturbances; and other conditions.

Sleep Paralysis

A common condition characterized by transient partial or total paralysis of skeletal muscles and areflexia that occurs upon awakening from sleep or less often while falling asleep. Stimuli such as touch or sound may terminate the episode, which usually has a duration of seconds to minutes. This condition may occur in normal subjects or be associated with NARCOLEPSY; CATAPLEXY; and hypnagogic HALLUCINATIONS. The pathophysiology of this condition is closely related to the normal hypotonia that occur during REM sleep. (From Adv Neurol 1995;67:245-271)

Sleep Wake Disorders

Abnormal sleep-wake schedule or pattern associated with the CIRCADIAN RHYTHM which affect the length, timing, and/or rigidity of the sleep-wake cycle relative to the day-night cycle.

Tachypnea

Increased RESPIRATORY RATE.