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)
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
All CodesBillable Only
Internal Codes
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  • F02.B—

    Dementia in other diseases classified elsewhere, moderate

  • F02.B0—

    Dementia in other diseases classified elsewhere, moderate, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety

  • F02.B1—

    Dementia in other diseases classified elsewhere, moderate, with behavioral disturbance

  • F02.B11—

    Dementia in other diseases classified elsewhere, moderate, with agitation

  • F02.B18—

    Dementia in other diseases classified elsewhere, moderate, with other behavioral disturbance

  • F02.B2—

    Dementia in other diseases classified elsewhere, moderate, with psychotic disturbance

  • F02.B3—

    Dementia in other diseases classified elsewhere, moderate, with mood disturbance

  • F02.B4—

    Dementia in other diseases classified elsewhere, moderate, with anxiety

  • F02.C—

    Dementia in other diseases classified elsewhere, severe

  • F02.C0—

    Dementia in other diseases classified elsewhere, severe, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety

  • F02.C1—

    Dementia in other diseases classified elsewhere, severe, with behavioral disturbance

  • F02.C11—

    Dementia in other diseases classified elsewhere, severe, with agitation

  • F02.C18—

    Dementia in other diseases classified elsewhere, severe, with other behavioral disturbance

  • F02.C2—

    Dementia in other diseases classified elsewhere, severe, with psychotic disturbance

  • F02.C3—

    Dementia in other diseases classified elsewhere, severe, with mood disturbance

  • F02.C4—

    Dementia in other diseases classified elsewhere, severe, with anxiety

  • F03—

    Unspecified dementia

  • F03.9—

    Unspecified dementia, unspecified severity

  • F03.90—

    Unspecified dementia, unspecified severity, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety

  • F03.91—

    Unspecified dementia, unspecified severity, with behavioral disturbance

  • F03.911—

    Unspecified dementia, unspecified severity, with agitation

  • F03.918—

    Unspecified dementia, unspecified severity, with other behavioral disturbance

  • F03.92—

    Unspecified dementia, unspecified severity, with psychotic disturbance

  • F03.93—

    Unspecified dementia, unspecified severity, with mood disturbance

  • F03.94—

    Unspecified dementia, unspecified severity, with anxiety

  • F03.A—

    Unspecified dementia, mild

  • F03.A0—

    Unspecified dementia, mild, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety

  • F03.A1—

    Unspecified dementia, mild, with behavioral disturbance

  • F03.A11—

    Unspecified dementia, mild, with agitation

  • F03.A18—

    Unspecified dementia, mild, with other behavioral disturbance

  • F03.A2—

    Unspecified dementia, mild, with psychotic disturbance

  • F03.A3—

    Unspecified dementia, mild, with mood disturbance

  • F03.A4—

    Unspecified dementia, mild, with anxiety

  • F03.B—

    Unspecified dementia, moderate

  • F03.B0—

    Unspecified dementia, moderate, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety

  • F03.B1—

    Unspecified dementia, moderate, with behavioral disturbance

  • F03.B11—

    Unspecified dementia, moderate, with agitation

  • F03.B18—

    Unspecified dementia, moderate, with other behavioral disturbance

  • F03.B2—

    Unspecified dementia, moderate, with psychotic disturbance

  • F03.B3—

    Unspecified dementia, moderate, with mood disturbance

  • F03.B4—

    Unspecified dementia, moderate, with anxiety

  • F03.C—

    Unspecified dementia, severe

  • F03.C0—

    Unspecified dementia, severe, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety

  • F03.C1—

    Unspecified dementia, severe, with behavioral disturbance

  • F03.C11—

    Unspecified dementia, severe, with agitation

  • F03.C18—

    Unspecified dementia, severe, with other behavioral disturbance

  • F03.C2—

    Unspecified dementia, severe, with psychotic disturbance

  • F03.C3—

    Unspecified dementia, severe, with mood disturbance

  • F03.C4—

    Unspecified dementia, severe, with anxiety

  • F04—

    Amnestic disorder due to known physiological condition

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