Neurologist said he is considering filing with a judge to remove my FIL from his finances

My FIL was diagnosed with Alzheimer’s around 6 months ago. While it has been concerning seeing his cognitive decline, he is still pretty much all there for the most part.

But a recent checkup at the neurologist revealed things are worse off than anyone thought. The doctor asked him to draw a clock that read 11:30. My FIL drew a circle with a 1 and a 4. He said he knew a 12 went somewhere but he didn’t know where. And that was that.

My wife attended the appointment and said he didn’t even really comprehend how weird it was to not remember how to draw a clock. Like he’s not aware at all of his own cognitive decline.

My FIL also couldn’t remember who he had an appointment with about one of his bank accounts. He just knew that he was moving a substantial amount of money around but he would have to check his notes later to see who it was with. Obviously this was really concerning to everyone in the room.

The doctor brought up taking my FIL’s keys and his ability to do his own finances. He told my wife as an aside that if they aren’t able to make necessary changes ASAP, he would bring it to a judge.

Has anyone experienced something like this before?

I tried googling, but I couldn’t find any evidence that a doctor could go to a judge to remove a person’s ability to do their own finances. It’s not that anyone wants him to continue doing his own finances, but the threat from the neurologist unnerved my wife a good bit.