F03.C — Unspecified dementia, severe
F03.C is a non-billable header ICD-10-CM code for unspecified dementia, severe. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes2 inherited from the categories above F03.C
Also inherited, and the opposite of Excludes1: these conditions are not part of F03.C, but a patient can have both, so you may code both.
Other codes that can never be billed with F03.C
These codes carry an Excludes1 note pointing at F03.C. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading F03.C alone.
Risk adjustment
F03.C does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code history
F03.C has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead F03.C
5 child codes. Green means billable.
- F03.C0Unspecified dementia, severe, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety
- F03.C1Unspecified dementia, severe, with behavioral disturbance
- F03.C2Unspecified dementia, severe, with psychotic disturbance
- F03.C3Unspecified dementia, severe, with mood disturbance
- F03.C4Unspecified dementia, severe, with anxiety
Related codes at this level
Codes that share F03. If F03.C is not quite right, the correct code is usually one of these.
Questions about F03.C
- Is F03.C a billable ICD-10-CM code?
- No. F03.C is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does F03.C sit in the tabular list?
- Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Mental disorders due to known physiological conditions (F01-F09).