Bramhall resigned in May 2014 following a disciplinary hearing. According to The Telegraph, the liver, spleen and pancreatic surgeon worked in Queen Elizabeth Hospital's liver unit for 12 years.
Prosecutor Tony Badenock described the case as “highly unusual and complex” within both the medical community and the law.
"It is factually, so far as we have been able to establish, without legal precedent in criminal law," Badenock said, according to The Telegraph.
The guilty pleas represented Bramhall’s acceptance that what he did was both ethically and criminally wrong, the prosecutor said.
"They reflect the fact that Dr. Bramhall's initialing on a patient's liver was not an isolated incident, but rather a repeated act on two occasions requiring some skill and concentration," Badenock said. "It was done in the presence of colleagues."
Bramhall told the BBC at the time of his 2014 resignation that he "made a mistake" when he branded his patients' organs.
"I made the decision on 16 May I would hand in my notice," Bramhall said. "It is a bit raw, and I have to move on."