You can check out a Cornell system..
https://www.cornell.com/clinic/pdf/clinic_status_system.pdf#search=%22patient%20room%20status%20light%20system%22
I've put in a couple of them, not much more than relays,switches,lamps and a power supply but work really well. Since it's so simple, Cornell can pretty much design it to do whatever you would like.

I also had one Dentist request a "Digit Up" system because another Dentist friend had one that he really liked but I was unable to find anything by that name.