ICD-10-CM Codes 2026 (USA)

• F51.02	Adjustment insomnia

• F51.01	Primary insomnia
  F51.02	Adjustment insomnia
  F51.03	Paradoxical insomnia
  F51.04	Psychophysiologic insomnia
  F51.05	Insomnia due to other mental disorder
  F51.09	Other insomnia not due to a substance or known physiological condition
  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
  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

Created by Peter Blahut, MD