G31 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Other degenerative diseases of nervous system, not elsewhere classified.
Use additional code
Code, if applicable, for codes G31.0-G31.83, G31.85-G31.9, to identify:
Dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
Dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
Dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
Dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
Mild neurocognitive disorder due to known physiological condition (F06.7-)
Type 2 excludes
Reye's syndrome (G93.7)
Codes
Versions
2025
No changes
2024
Code changed
Use additional code
For codes G31.0-G31.83, G31.85-G31.9, use additional code, if applicable, to identify:dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)mild neurocognitive disorder due to known physiological condition (F06.7-)
- code, if applicable, for codes G31.0-G31.83, G31.85-G31.9, to identify:
- dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
- dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
- dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
- dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
- dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
- mild neurocognitive disorder due to known physiological condition (F06.7-)
2023
Code changed
Use additional code
For codes G31.0-G31.83, G31.85-G31.9, use additional code to identify:dementia with behavioral disturbance (F02.81)dementia without behavioral disturbance (F02.80)
- For codes G31.0-G31.83, G31.85-G31.9, use additional code, if applicable, to identify:
- dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
- dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
- dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
- dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
- dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
- mild neurocognitive disorder due to known physiological condition (F06.7-)
2022
No changes
2021
No changes
2020
Code changed
Use additional code
code to identify:dementia with behavioral disturbance (F02.81)dementia without behavioral disturbance (F02.80)
- For codes G31.0-G31.83, G31.85-G31.9, use additional code to identify:
- dementia with behavioral disturbance (F02.81)
- dementia without behavioral disturbance (F02.80)
2019
No changes
2018
No changes
2017
No changes
2016
New code