ICD-9-CM

327 Organic sleep disorders
327.0: Organic disorders of initiating and maintaining sleep [Organic insomnia] Excludes: insomnia NOS (780.52) insomnia not due to a substance or known physiological condition (307.41-307.42) insomnia with sleep apnea NOS (780.51)
327.1: Organic disorder of excessive somnolence [Organic hypersomnia] Excludes: hypersomnia NOS (780.54) hypersomnia not due to a substance or known physiological condition (307.43-307.44) hypersomnia with sleep apnea NOS (780.53)
327.2: Organic sleep apnea Excludes: Cheyne-Stokes breathing (786.04) hypersomnia with sleep apnea NOS (780.53) insomnia with sleep apnea NOS (780.51) sleep apnea in newborn (770.81-770.82) sleep apnea NOS (780.57)
327.3: Circadian rhythm sleep disorder Organic disorder of sleep wake cycle Organic disorder of sleep wake schedule Excludes: alcohol induced circadian rhythm sleep disorder (291.82) circadian rhythm sleep disorder of nonorganic origin (307.45) disruption of 24 hour sleep wake cycle NOS (780.55) drug induced circadian rhythm sleep disorder (292.85)
327.4: Organic parasomnia Excludes: alcohol induced parasomnia (291.82) drug induced parasomnia (292.85) parasomnia not due to a known physiological condition (307.47)
327.5: Organic sleep related movement disorders Excludes: restless legs syndrome (333.94) sleep related movement disorder NOS (780.58)
327.8: Other organic sleep disorders

327 Organic sleep disorders

Excludes:

insomnia NOS (780.52)

insomnia not due to a substance or known physiological condition (307.41-307.42)

insomnia with sleep apnea NOS (780.51)

Excludes:

hypersomnia NOS (780.54)

hypersomnia not due to a substance or known physiological condition (307.43-307.44)

hypersomnia with sleep apnea NOS (780.53)