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2026 ICD-10-CM · F01-F09

Mental disorders due to known physiological conditions

ICD-10 codes F01–F09 classify mental disorders that arise from identifiable physiological conditions — including vascular dementia, dementia in Alzheimer's, delirium, and personality changes due to known causes. Accurate coding requires identifying both the mental disorder and its underlying physiological etiology.

This reference is provided for billing and documentation guidance only. It is not medical advice. For clinical decision-making, consult the current CMS ICD-10-CM Official Guidelines for Coding and Reporting, and verify code applicability against the patient's documented clinical findings.

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