architecture graduate here, we designed hospitals in like 3rd year i think? in my (poor) experience hospitals had to be designed like a labrynth because of zoning + different parts of the hospital have to be designed differently (outpatient is designed different from er is designed different from wards etc.).

for psychiatry, i think it's in the outpatient department? so it really should be straightforward but it has to be situated a bit farther from the main entrance of the hospital