In what has been described as "horrific" a mix-up on identification tags saw the wrong person being the recipient of a brain surgery.
The directive took effect immediately pending investigations into the mistaken surgery conducted on a patient two weeks ago.
The hospital's chief operating officer, Lily Koros, issued a statement announcing the suspension of four medics who were at work on that night. There was public outrage over the incident at the hospital, which was already under scrutiny after new mothers claimed they were sexually assaulted there.
Doctors in Kenya realized two hours into brain surgery they were operating on the wrong patient.
In a miracle of some sort, the Nation was informed that both patients were in good condition, and that the one who had a clot might not undergo surgery because he had improved significantly.
Oh my God! Brain surgery on the wrong patient?
The flagship national hospital has also been plagued with reports of broken equipment, overcrowding, and long waiting times for treatment.
The Kenya Medical Practitioners, Pharmacists and Dentist' Union defended the hospital and said staff shortages were leading to a lack of adequate space to operate in.
"These are quality system issues that should not be levelled at staff", Oluga said, adding punishing doctors and nurses would not address problems in the patient tracking system.
'Doctors are overwhelmed. You find one doctor could be doing 10 to 19 operations [in a day]'.
The board regulating medical practice says such a mix-up is a first in the country.
Some called for the resignation of the hospital's entire board of management in light of the other controversies at the institution.
The names of the patients, who were operated on over the weekend, had not been released on Friday.