Doctors aren't bound by there oath really.
>Modern Oaths
Although most do not swear to the original Hippocratic Oath, the majority of doctors do take an oath – often when they graduate from medical school. Despite early disinterest, physician oaths began to come into vogue after World War II.
During the Holocaust, doctors in Nazi concentration camps committed previously inconceivable atrocitiesagainst prisoners. Experimenting with extreme temperatures, radiation, untested drugs and vaccines, unnecessary and sometimes bizarre surgeries and infecting captives with deadly diseases, the exploits of concentration camp physicians shocked and horrified the world. Sane doctors realized stricter rules, and a code of ethics, were needed.
In 1948, the 2nd General Assembly of the World Medical Association adopted the Declaration of Geneva, appearing below as amended:
AT THE TIME OF BEING ADMITTED AS A MEMBER OF THE MEDICAL PROFESSION:
I solemnly pledge to consecrate my life to the service of humanity . . .
I will practice my profession with conscience and dignity;
The health of my patient will be my first consideration;
I will respect the secrets that are confided in me . . .
I will not permit considerations of age, disease or disability, creed, ethnic origin, gender, nationality, political affiliation, race, sexual orientation, social standing or any other factor to intervene between my duty and my patient;
I will maintain the utmost respect for human life;
I will not use my medical knowledge to violate human rights and civil liberties, even under threat . . . .
Similarly, in 1964 a modern version of the Hippocratic Oath was penned by Professor Lasagna of the School of Medicine at Tufts University. Although the modern oath retains many of the themes of the original, it omits the troublesome parts about surgery, euthanasia, abortion and sexual relations.
A number of other, similar oaths have also been written, and today, nearly every medical school requires some sort of oath of its graduates, although most are seen as "ceremonial and nonobligatory . . . compared to that taken by a judge, president, or other politician when he or she is sworn into office."
https://gizmodo.com/doctors-aren-t-actually-bound-by-the-hippocratic-oath-1465044222