Mental disorders due to known physiological conditions (F01-F09) ICD-10-CM
The F01–F09 section covers mental disorders due to known physiological conditions with 123 ICD-10-CM diagnosis codes, of which 91 are billable in fiscal year 2027. The section is organized into the 8 code ranges listed below.
- This block comprises a range of mental disorders grouped together on the basis of their having in common a demonstrable etiology in cerebral disease, brain injury, or other insult leading to cerebral dysfunction. The dysfunction may be primary, as in diseases, injuries, and insults that affect the brain directly and selectively; or secondary, as in systemic diseases and disorders that attack the brain only as one of the multiple organs or systems of the body that are involved.
Code Ranges in This Section 8 ranges · 123 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the F01–F09 Code Range
These mental and behavioral disorders are linked to a known physical condition. They include dementia, delirium, and disorders affecting memory, mood, or personality.
The dementia categories differ by how the condition is identified: F01 is vascular dementia, F02 is dementia in another disease, and F03 is unspecified dementia. Each separates unspecified, mild, moderate, and severe cases. Vascular dementia is associated with brain blood vessel disorders, including brain infarction or long-term reduced blood flow.
F04 identifies an amnestic, or memory, disorder. F05 identifies delirium, which involves sudden changes in attention, memory, language, or perception. F06 separates other disorders by type, including those involving hallucinations, delusions, mood, or anxiety. F07 separates personality change from other or unspecified personality and behavioral disorders. F09 identifies an unspecified mental disorder linked to a known physical condition.
Questions About This Page
How many codes are in the F01-F09 range?
The F01-F09 range contains 123 ICD-10-CM diagnosis codes in FY 2027. 91 of them are billable, and the rest are category headers that organize the section.
What conditions does F01-F09 cover?
The range covers mental disorders due to known physiological conditions. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
