1. F51 Sleep disorders not due to a substance or known physiological condition

    1. F51.0 Insomnia not due to a substance or known physiological condition

      1. F51.01 Primary insomnia

        Inclusion term(s):

        • Idiopathic insomnia
      2. F51.02 Adjustment insomnia

      3. F51.03 Paradoxical insomnia

      4. F51.04 Psychophysiologic insomnia

      5. F51.05 Insomnia due to other mental disorder

      6. F51.09 Other insomnia not due to a substance or known physiological condition

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

      1. F51.11 Primary hypersomnia

      2. F51.12 Insufficient sleep syndrome

      3. F51.13 Hypersomnia due to other mental disorder

      4. F51.19 Other hypersomnia not due to a substance or known physiological condition

    3. F51.3 Sleepwalking [somnambulism]

      Inclusion term(s):

      • Non-rapid eye movement sleep arousal disorders, sleepwalking type
    4. F51.4 Sleep terrors [night terrors]

      Inclusion term(s):

      • Non-rapid eye movement sleep arousal disorders, sleep terror type
    5. F51.5 Nightmare disorder

      Inclusion term(s):

      • Dream anxiety disorder
    6. F51.8 Other sleep disorders not due to a substance or known physiological condition

    7. F51.9 Sleep disorder not due to a substance or known physiological condition, unspecified

      Inclusion term(s):

      • Emotional sleep disorder NOS
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.