This location is part of the long quest, The Silver Shroud. There's a nearby supermutant outpost with three suiciders. If you're powerful enough to kill them (aim for the legs!) before they detonate themselves, you'll be able to loot the mini-nukes they're carrying. Hence, this place is one of the good locations to harvest mini-nukes whenever the enemies reset.
The parking space across the hospital is also an unmarked location. It features a maze with deadly traps. Disarming these traps will give you components. After passing through the multiple gates, there will be a ramp filled with bathroom scales and grenade bouquets. Carefully disarming this will yield valuable Copper and fragmentation grenades so you can always come back to this location once in a while to gather these components and grenades.
There are hubflowers outside and a nearby supermutant outpost. The first floor doesn’t have anything notable, except for the normal loot you’ll normally found in various “dungeon areas”. Use the elevator to reach the upper floor.
As soon as you get off the elevator, turn to the right to find an Advanced-locked door. Inside, you’ll find an Expert floor safe. Go down the ramp and kill all enemies in the next room. There’s a turret in the following room so destroy that and continue upstairs. There’s the Nuka-Cola Quantum on the desk to the left after reaching the upper walkway. Continue further ahead to reach the next elevator.
After disembarking from the elevator, kill the next wave of enemies and go around the rooms to the SE to find a hole on the floor. Drop there and take out the raider and two turrets in the end of the hallway. There’s an advanced door to the south. There’s a Syringer rifle inside, some chems, and a chem station. Head to the next room. From there, kill a couple more raiders before reaching the elevator via the corridor to the right.
The elevator leads to the basement area. There’s a Novice Explosives crate under the stairs. The control room has a red steamer trunk as well.