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)
Internal Codes
  • F18.121

    Inhalant abuse with intoxication delirium

  • F18.129

    Inhalant abuse with intoxication, unspecified

  • F18.14

    Inhalant abuse with inhalant-induced mood disorder

  • F18.150

    Inhalant abuse with inhalant-induced psychotic disorder with delusions

  • F18.151

    Inhalant abuse with inhalant-induced psychotic disorder with hallucinations

  • F18.159

    Inhalant abuse with inhalant-induced psychotic disorder, unspecified

  • F18.17

    Inhalant abuse with inhalant-induced dementia

  • F18.180

    Inhalant abuse with inhalant-induced anxiety disorder

  • F18.188

    Inhalant abuse with other inhalant-induced disorder

  • F18.19

    Inhalant abuse with unspecified inhalant-induced disorder

  • F18.20

    Inhalant dependence, uncomplicated

  • F18.21

    Inhalant dependence, in remission

  • F18.220

    Inhalant dependence with intoxication, uncomplicated

  • F18.221

    Inhalant dependence with intoxication delirium

  • F18.229

    Inhalant dependence with intoxication, unspecified

  • F18.24

    Inhalant dependence with inhalant-induced mood disorder

  • F18.250

    Inhalant dependence with inhalant-induced psychotic disorder with delusions

  • F18.251

    Inhalant dependence with inhalant-induced psychotic disorder with hallucinations

  • F18.259

    Inhalant dependence with inhalant-induced psychotic disorder, unspecified

  • F18.27

    Inhalant dependence with inhalant-induced dementia

  • F18.280

    Inhalant dependence with inhalant-induced anxiety disorder

  • F18.288

    Inhalant dependence with other inhalant-induced disorder

  • F18.29

    Inhalant dependence with unspecified inhalant-induced disorder

  • F18.90

    Inhalant use, unspecified, uncomplicated

  • F18.91

    Inhalant use, unspecified, in remission

  • F18.920

    Inhalant use, unspecified with intoxication, uncomplicated

  • F18.921

    Inhalant use, unspecified with intoxication with delirium

  • F18.929

    Inhalant use, unspecified with intoxication, unspecified

  • F18.94

    Inhalant use, unspecified with inhalant-induced mood disorder

  • F18.950

    Inhalant use, unspecified with inhalant-induced psychotic disorder with delusions

  • F18.951

    Inhalant use, unspecified with inhalant-induced psychotic disorder with hallucinations

  • F18.959

    Inhalant use, unspecified with inhalant-induced psychotic disorder, unspecified

  • F18.97

    Inhalant use, unspecified with inhalant-induced persisting dementia

  • F18.980

    Inhalant use, unspecified with inhalant-induced anxiety disorder

  • F18.988

    Inhalant use, unspecified with other inhalant-induced disorder

  • F18.99

    Inhalant use, unspecified with unspecified inhalant-induced disorder

  • F19.10

    Other psychoactive substance abuse, uncomplicated

  • F19.11

    Other psychoactive substance abuse, in remission

  • F19.120

    Other psychoactive substance abuse with intoxication, uncomplicated

  • F19.121

    Other psychoactive substance abuse with intoxication delirium

  • F19.122

    Other psychoactive substance abuse with intoxication with perceptual disturbances

  • F19.129

    Other psychoactive substance abuse with intoxication, unspecified

  • F19.130

    Other psychoactive substance abuse with withdrawal, uncomplicated

  • F19.131

    Other psychoactive substance abuse with withdrawal delirium

  • F19.132

    Other psychoactive substance abuse with withdrawal with perceptual disturbance

  • F19.139

    Other psychoactive substance abuse with withdrawal, unspecified

  • F19.14

    Other psychoactive substance abuse with psychoactive substance-induced mood disorder

  • F19.150

    Other psychoactive substance abuse with psychoactive substance-induced psychotic disorder with delusions

  • F19.151

    Other psychoactive substance abuse with psychoactive substance-induced psychotic disorder with hallucinations

  • F19.159

    Other psychoactive substance abuse with psychoactive substance-induced psychotic disorder, unspecified

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