Simon Bramhall, the British surgeon who branded his initials onto patients' livers during transplant surgeries at least twice, has been ordered to do 120 hours of community service and pay £10,000 (more than $13,600).
The 53-year-old surgeon resigned from Queen Elizabeth Hospital in Birmingham, England, in 2014 after another doctor discovered what he'd done.
Prosecutor Tony Badenoch said that Bramhall "said in hindsight [the branding] was naive and foolhardy - a misjudged attempt to relieve the tension in theatre", The Guardian reports.
The "arrogant" NHS surgeon admitted to two counts of assault by beating last month. He was given a formal reprimand by the General Medical Council, a professional governing body, last February.
He used an argon beam machine, an instrument created to seal bleeding blood vessels, to sear his initials "SB" into their livers.
Addressing the earlier court hearing, Mr Badenoch said: 'This has been a highly unusual and complex case, both within the expert medical testimony served by both sides and in law.
"I accept that on both occasions you were exhausted and stressed and I accept that this may have affected your judgment", the judge continued.
He said: "This was conduct born of professional arrogance of such magnitude that it strayed into criminal behaviour".
'I accept that you didn't intend or foresee anything but the most trivial of harm would be caused'.
One of the victims, referred to in court as Patient A, received a donor organ in 2013 in a life-saving operation carried out by Bramhall.
Bramhall boasted to a colleague "this is what I do" as he burned his initials on to an unconscious patient's newly transplanted liver, prosecutors said.
Bramhall originally told police he had "flicked his wrist" and made the mark within a few seconds, while a nurse who questioned him told Birmingham Crown Court he told her: "I do this".
Bramhall's actions came to light when one of the patients had further surgery a week later.
The offence of assault by beating was brought against the consultant surgeon to reflect the act of marking the liver and there is no suggestion he was responsible for physically "beating" either patient.
Bramhall worked at Queen Elizabeth Hospital in Birmingham for 12 years before he quit.
Doctors have said that burning organs in this way would not have damaged them or affected the health of the patients.