F03.AUnspecified dementia, mild

F03.A is the ICD-10-CM diagnosis code for unspecified dementia, mild. It belongs to category F03 (unspecified dementia), block F01-F09 (mental disorders due to known physiological conditions) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

Within F03 (unspecified dementia), F03.A is specifically for unspecified dementia, mild. Related codes cover unspecified severity (F03.9), moderate (F03.B) and severe (F03.C).

To report this condition, pick the subcode that matches the documentation: F03.A0 (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety), F03.A1 (with behavioral disturbance), F03.A2 (with psychotic disturbance), F03.A3 (with mood disturbance) and F03.A4 (with anxiety).

Don't report F03.A together with the conditions in its Excludes1 note: mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-).

It was added in FY2023, effective October 1, 2022.