eMedCodes logo

F51.1 - Hypersomnia not due to a substance or known physiological condition


The ICD 10 Code for Hypersomnia not due to a substance or known physiological condition is listed as F51.1.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field Value
Diagnosis Code: F51.1
Description: Hypersomnia not due to a substance or known physiological condition
  • Excludes2: 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 NOS (G47.10)
  • hypersomnia due to known physiological condition (G47.10)
  • idiopathic hypersomnia (G47.11, G47.12)
  • narcolepsy (G47.4-)
Chapter Mental and behavioral disorders (F01-F99)
Block Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59)
Parent F51 - Sleep disorders not due to a substance or known physiological condition
ICD-10-CM Children (deeper level / typically more specific) of F51.1:
F51.11 - Primary hypersomnia
F51.12 - Insufficient sleep syndrome
F51.13 - Hypersomnia due to other mental disorder
F51.19 - Other hypersomnia not due to a substance or known physiological condition
ICD-10-CM Siblings (same level / similar specificity) of F51.1:
F51.0 - Insomnia not due to a substance or known physiological condition
F51.3 - Sleepwalking [somnambulism]
F51.4 - Sleep terrors [night terrors]
F51.5 - Nightmare disorder
F51.8 - Other sleep disorders not due to a substance or known physiological condition
F51.9 - Sleep disorder not due to a substance or known physiological condition, unspecified