Use the door control to access the blood-stained primary lobby area of the Medical Pavilion. As with any hospital, there are several distinct wings that you can head to: the surgery wing is to the right, the dental wing is down the stairs, and the crematorium and funeral parlor are up the hall to the left.
Equip Electro Bolt and peek out from around the corner towards the Turret on the far side of the wall. Quickly stun it with Electro Bolt then rush forward to hack it before it resumes firing. Gather up the Audio Diaries and secure the immediate area for any stray Splicers roaming the halls. There is another Turret hiding in the supply closet just north of the desk with the cash register—stun it with Electro Bolt through the hole in the wall, then run around to the opening to hack it. These two Turrets, in combination with the Security Bot you hacked earlier, should defeat each of the Leadhead Splicers that attack—this tactic helps you conserve ammunition.
Hit up the registers on (and behind) the counter for some extra money, then stop at the Circus of Values and El Ammo Bandito vending machines in the north corner to load up on ammunition. Dr. Steinman’s “Aesthetic Ideals” cosmetic surgery practice is due west at the far end of the lobby. Head through the large door on the walkway, above the stairs leading down to the dental wing. Continue through the glass-walled tunnel, while taking note of the Big Daddy and Little Sister in the corridor off to the left.