The following personnel were employed or patients at Mercy Hospital in 1986.
Named
Unnamed
Chekov's op team
Two doctors and two nurses prepared the operation for Chekov following his fall from the aircraft carrier USS Enterprise CVN-65. When Kirk, Gillian and McCoy came in to treat and kidnap Chekov the team was jailed in a small room behind the operation room. The young doctor previously asked McCoy in what he has his doctor, dentistry, following McCoy's comments about medievalism. (Star Trek IV: The Voyage Home)
Elderly patient
This elderly patient had been in for kidney dialysis treatment and was lying on a floor bed when Doctor Leonard McCoy saw her and asked her what her disease was. McCoy gave her a pill that caused her to grow a new kidney, to her delight and the bafflement of the hospital staff. (Star Trek IV: The Voyage Home)
Interns in elevator
These two hospital interns talked about the different views of the doctors Gottlieb and Weintraub while using the elevator. When Kirk, Gillian and McCoy joined them, McCoy compared their discussion and the therapies with radical chemotherapy and image therapy with the Spanish Inquisition. (Star Trek IV: The Voyage Home)
Patients
These patients were treated at the Mercy Hospital in 1986. (Star Trek IV: The Voyage Home)
Personnel
These doctors and nurses worked at Mercy Hospital in 1986 when Chekov was treated there following his injuries and when Kirk, McCoy and Gillian Taylor rescued him. (Star Trek IV: The Voyage Home)
Team in corridor
A team of doctors and nurses accompanied the elderly kidney dialysis patient in a wheelchair after McCoy's pill let her grew a new kidney. (Star Trek IV: The Voyage Home)
Visitors
These visitors were at Mercy Hospital in 1986 when Kirk, McCoy and Gillian Taylor rescued Chekov. (Star Trek IV: The Voyage Home)