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
  • 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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