G47.11 Idiopathic hypersomnia with long sleep time

Billable ICD-10-CM code, FY2026.

Applicable to

• Idiopathic hypersomnia NOS

Applies from G47 Sleep disorders

Excludes2 (not included here)

• nightmares (F51.5)
• nonorganic sleep disorders (F51.-)
• sleep terrors (F51.4)
• sleepwalking (F51.3)

Applies from G47.1 Hypersomnia

Excludes2 (not included here)

• alcohol-related hypersomnia (F10.182, F10.282, F10.982)
• drug-related hypersomnia (F11.182, F11.282, F11.982, F13.182, F13.282, F13.982, F14.182, F14.282, F14.982, F15.182, F15.282, F15.982, F19.182, F19.282, F19.982)
• hypersomnia due to a mental disorder (F51.13)
• hypersomnia not due to a substance or known physiological condition (F51.1-)
• primary hypersomnia (F51.11)
• sleep apnea (G47.3-)

MS-DRG index

Defines the logic of DRG(s) 887 in MDC 19.

Approximate ICD-9-CM (GEMs)

• 327.11 Idiopathic hypersomnia with long sleep time

Code annotations containing back-references to G47.11

Back-references to G47.11

• Type 2 Excludes: F51.1 Hypersomnia not due to a substance or known physiological condition ("idiopathic hypersomnia (G47.11, G47.12)")

Back-references to G47

• Type 2 Excludes: F51 Sleep disorders not due to a substance or known physiological condition ("organic sleep disorders (G47.-)")

Diagnosis Index entries for G47.11

• Hypersomnia (organic) › idiopathic
• Hypersomnia (organic) › idiopathic › with long sleep time

Nearby codes

• 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 (this code)
• 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