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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  • F40.8—

    Other phobic anxiety disorders

  • F40.9—

    Phobic anxiety disorder, unspecified

  • F41.0—

    Panic disorder [episodic paroxysmal anxiety]

  • F41.1—

    Generalized anxiety disorder

  • F41.3—

    Other mixed anxiety disorders

  • F41.8—

    Other specified anxiety disorders

  • F41.9—

    Anxiety disorder, unspecified

  • F42.2—

    Mixed obsessional thoughts and acts

  • F42.3—

    Hoarding disorder

  • F42.4—

    Excoriation (skin-picking) disorder

  • F42.8—

    Other obsessive-compulsive disorder

  • F42.9—

    Obsessive-compulsive disorder, unspecified

  • F43.0—

    Acute stress reaction

  • F43.10—

    Post-traumatic stress disorder, unspecified

  • F43.11—

    Post-traumatic stress disorder, acute

  • F43.12—

    Post-traumatic stress disorder, chronic

  • F43.20—

    Adjustment disorder, unspecified

  • F43.21—

    Adjustment disorder with depressed mood

  • F43.22—

    Adjustment disorder with anxiety

  • F43.23—

    Adjustment disorder with mixed anxiety and depressed mood

  • F43.24—

    Adjustment disorder with disturbance of conduct

  • F43.25—

    Adjustment disorder with mixed disturbance of emotions and conduct

  • F43.29—

    Adjustment disorder with other symptoms

  • F43.81—

    Prolonged grief disorder

  • F43.89—

    Other reactions to severe stress

  • F43.9—

    Reaction to severe stress, unspecified

  • F44.0—

    Dissociative amnesia

  • F44.1—

    Dissociative fugue

  • F44.2—

    Dissociative stupor

  • F44.4—

    Conversion disorder with motor symptom or deficit

  • F44.5—

    Conversion disorder with seizures or convulsions

  • F44.6—

    Conversion disorder with sensory symptom or deficit

  • F44.7—

    Conversion disorder with mixed symptom presentation

  • F44.81—

    Dissociative identity disorder

  • F44.89—

    Other dissociative and conversion disorders

  • F44.9—

    Dissociative and conversion disorder, unspecified

  • F45.0—

    Somatization disorder

  • F45.1—

    Undifferentiated somatoform disorder

  • F45.20—

    Hypochondriacal disorder, unspecified

  • F45.21—

    Hypochondriasis

  • F45.22—

    Body dysmorphic disorder

  • F45.29—

    Other hypochondriacal disorders

  • F45.41—

    Pain disorder exclusively related to psychological factors

  • F45.42—

    Pain disorder with related psychological factors

  • F45.8—

    Other somatoform disorders

  • F45.9—

    Somatoform disorder, unspecified

  • F48.1—

    Depersonalization-derealization syndrome

  • F48.2—

    Pseudobulbar affect

  • F48.8—

    Other specified nonpsychotic mental disorders

  • F48.9—

    Nonpsychotic mental disorder, unspecified

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