F03 vs F06.8
F03 (Unspecified dementia) compared with F06.8 (Other specified mental disorders due to known physiological condition), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
Yes, when both are documented. F03 carries an Excludes2 note covering F06.8: “mild memory disturbance due to known physiological condition (F06.8)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
No — do not report together. F06.8 carries an Excludes1 note covering F03: “unspecified dementia (F03.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| F03Unspecified dementia | F06.8Other specified mental disorders due to known physiological condition | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | F01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99) | F01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99) |
| Definition | Unspecified dementia is a non-billable ICD-10-CM category code (F03). | Other specified mental disorders due to known physiological condition is a billable ICD-10-CM diagnosis code (F06.8). |
| Includes | Major neurocognitive disorder NOS Presenile dementia NOS Presenile psychosis NOS Primary degenerative dementia NOS | mental disorders due to endocrine disorder mental disorders due to exogenous hormone mental disorders due to exogenous toxic substance mental disorders due to primary cerebral disease |
| Code first | — | the underlying physiological condition |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources