ICD-10-CM category
F09: Unspecified mental disorder due to known physiological condition
F09 is “Unspecified mental disorder due to known physiological condition”. It has no subcodes in this category.
Frequently asked questions
What is ICD-10-CM code F09?
F09 is the ICD-10-CM code for Unspecified mental disorder due to known physiological condition.
Is F09 billable?
Yes — F09 is a valid, billable ICD-10-CM code (it has no further subdivisions).
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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