2019 ICD-10-CM Diagnosis Code F03.91

Unspecified dementia with behavioral disturbance

ICD-10-CM Coding Rules
Applicable To
  • Unspecified dementia with aggressive behavior
  • Unspecified dementia with combative behavior
  • Unspecified dementia with violent behavior
Use Additional
Use Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • code, if applicable, to identify wandering in unspecified dementia (
    ICD-10-CM Diagnosis Code Z91.83

    Wandering in diseases classified elsewhere

      2016 2017 2018 2019 Billable/Specific Code POA Exempt Manifestation Code
    Code First
    • underlying disorder such as:
    • Alzheimer's disease (G30.-)
    • autism or pervasive developmental disorder (F84.-)
    • intellectual disabilities (F70-F79)
    • unspecified dementia with behavioral disturbance (F03.9-)
The following code(s) above F03.91 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to F03.91:
  • F01-F99
    2019 ICD-10-CM Range F01-F99

    Mental, Behavioral and Neurodevelopmental disorders

    • disorders of psychological development
    Type 2 Excludes
    • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
    Mental, Behavioral and Neurodevelopmental disorders
  • F01-F09
    2019 ICD-10-CM Range F01-F09

    Mental disorders due to known physiological conditions

    • This block comprises a range of mental disorders grouped together on the basis of their having in common a demonstrable etiology in cerebral disease, brain injury, or other insult leading to cerebral dysfunction. The dysfunction may be primary, as in diseases, injuries, and insults that affect the brain directly and selectively; or secondary, as in systemic diseases and disorders that attack the brain only as one of the multiple organs or systems of the body that are involved.
    Mental disorders due to known physiological conditions
  • F03
    ICD-10-CM Diagnosis Code F03

    Unspecified dementia

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Applicable To
    • Presenile dementia NOS
    • Presenile psychosis NOS
    • Primary degenerative dementia NOS
    • Senile dementia NOS
    • Senile dementia depressed or paranoid type
    • Senile psychosis NOS
    Type 1 Excludes
    Type 2 Excludes
    • mild memory disturbance due to known physiological condition (F06.8)
    • senile dementia with delirium or acute confusional state (F05)
    Unspecified dementia
Approximate Synonyms ICD-10-CM F03.91 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):

Convert F03.91 to ICD-9-CM

Code History

Diagnosis Index entries containing back-references to F03.91:

ICD-10-CM Codes Adjacent To F03.91
F01.5 Vascular dementia
F01.50 …… without behavioral disturbance
F01.51 …… with behavioral disturbance
F02 Dementia in other diseases classified elsewhere
F02.8 Dementia in other diseases classified elsewhere
F02.80 …… without behavioral disturbance
F02.81 …… with behavioral disturbance
F03 Unspecified dementia
F03.9 Unspecified dementia
F03.90 …… without behavioral disturbance
F03.91 …… with behavioral disturbance
F04 Amnestic disorder due to known physiological condition
F05 Delirium due to known physiological condition
F06 Other mental disorders due to known physiological condition
F06.0 Psychotic disorder with hallucinations due to known physiological condition
F06.1 Catatonic disorder due to known physiological condition
F06.2 Psychotic disorder with delusions due to known physiological condition
F06.3 Mood disorder due to known physiological condition
F06.30 …… unspecified
F06.31 …… with depressive features
F06.32 …… with major depressive-like episode

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.