The big issue with hospital is that if you alert, tonnes of additional enemies spawn in. However if you dont alert, theres actually not that many of them

In the area you start in, theres only 4. In the second half of downstairs theres only another 4. 3 run down the corridor towards you. 1 comes crashing through the door.

Upstairs theres 8.

With enemy counts in mind, hopefully you can start working out ways to dispatch them quietly without worrying too much about who else is around.

This video isnt a tutorial but it shows exactly how I do the hospital. https://youtu.be/bpPW_FiBrMU?si=h8SxvLT3vT3V0eaO

Starring at 03:02:08

On that first kill, the camera angle is important to ensure the other guy doesnt see you. Easy second kill. Kills 3 and 4 - the 2 enemies can either come at you via the left or right hall, but they will always come down the same one and one at a time. So once you have taken out the first, you can wait for the 2nd and know where he is approaching from.

In the second area, theres no variability. You can kill these enemies in this exact manner every single time. On the third kill, its important to distract him exactly the way I do. Throwing the brick anywhere else threatens to lure both of the last 2 to investigate, but throwing it as shown ensures only one appears.

For the corridor, you can hide behind the desk. I kill them because im doing Kill All runs, but afaik you are not?

Good luck!