F09 is a billable/specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Unspecified mental disorder due to known physiological condition.
Inclusion term
Mental disorder NOS due to known physiological condition
Organic brain syndrome NOS
Organic mental disorder NOS
Organic psychosis NOS
Symptomatic psychosis NOS
Code first
The underlying physiological condition
Type 1 excludes
Versions
2025
No changes
2024
No changes
2023
Code changed
Type 1 excludes
psychosis NOS (F29)
- mild neurocognitive disorder due to known physiological condition (F06.7-)
- psychosis NOS (F29)
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code