F09Billable
Unspecified mental disorder due to known physiological condition
Short description: Unsp mental disorder due to known physiological condition
- Chapter
- 5. Mental, Behavioral and Neurodevelopmental disorders
- Category
- F09
- Effective date
- October 1, 2026
Frequently asked questions
What is ICD-10 code F09?
F09 is an ICD-10-CM diagnosis code for Unspecified mental disorder due to known physiological condition.
Is F09 a billable code?
Yes. F09 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is F09 in?
F09 falls under Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.
When did F09 become effective?
F09 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.