All ICD10 Codes
Chapter 5

F01–F99: Mental, Behavioral and Neurodevelopmental Disorders

Mental, Behavioral and Neurodevelopmental Disorders diagnostic classification updated for 2026.

Chapter Instructions

Includes
  • disorders of psychological development
Excludes2(Not included here. Code separately if applicable.)
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
All CodesBillable Only
Internal Codes
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  • F50.00—

    Anorexia nervosa, unspecified

  • F50.010—

    Anorexia nervosa, restricting type, mild

  • F50.011—

    Anorexia nervosa, restricting type, moderate

  • F50.012—

    Anorexia nervosa, restricting type, severe

  • F50.013—

    Anorexia nervosa, restricting type, extreme

  • F50.014—

    Anorexia nervosa, restricting type, in remission

  • F50.019—

    Anorexia nervosa, restricting type, unspecified

  • F50.020—

    Anorexia nervosa, binge eating/purging type, mild

  • F50.021—

    Anorexia nervosa, binge eating/purging type, moderate

  • F50.022—

    Anorexia nervosa, binge eating/purging type, severe

  • F50.023—

    Anorexia nervosa, binge eating/purging type, extreme

  • F50.024—

    Anorexia nervosa, binge eating/purging type, in remission

  • F50.029—

    Anorexia nervosa, binge eating/purging type, unspecified

  • F50.20—

    Bulimia nervosa, unspecified

  • F50.21—

    Bulimia nervosa, mild

  • F50.22—

    Bulimia nervosa, moderate

  • F50.23—

    Bulimia nervosa, severe

  • F50.24—

    Bulimia nervosa, extreme

  • F50.25—

    Bulimia nervosa, in remission

  • F50.810—

    Binge eating disorder, mild

  • F50.811—

    Binge eating disorder, moderate

  • F50.812—

    Binge eating disorder, severe

  • F50.813—

    Binge eating disorder, extreme

  • F50.814—

    Binge eating disorder, in remission

  • F50.819—

    Binge eating disorder, unspecified

  • F50.82—

    Avoidant/restrictive food intake disorder

  • F50.83—

    Pica in adults

  • F50.84—

    Rumination disorder in adults

  • F50.89—

    Other specified eating disorder

  • F50.9—

    Eating disorder, unspecified

  • 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

  • F52.0—

    Hypoactive sexual desire disorder

  • F52.1—

    Sexual aversion disorder

  • F52.21—

    Male erectile disorder

  • F52.22—

    Female sexual arousal disorder

  • F52.31—

    Female orgasmic disorder

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