Surgeon

[3] His magnum opus Suśruta-saṃhitā is one of the most important surviving ancient treatises on medicine and is considered a foundational text of both Ayurveda and surgery.

The title Mister became a badge of honour, and today, in many Commonwealth countries, a qualified doctor who, after at least four years' training, obtains a surgical qualification (formerly Fellow of the Royal College of Surgeons, but now also Member of the Royal College of Surgeons or a number of other diplomas) is given the honour of being allowed to revert to calling themselves Mr, Miss, Mrs or Ms in the course of their professional practice, but this time the meaning is different.

It is sometimes assumed that the change of title implies consultant status (and some mistakenly think non-surgical consultants are Mr too), but the length of postgraduate medical training outside North America is such that a qualified surgeon may be years away from obtaining such a post: many doctors previously obtained these qualifications in the senior house officer grade, and remained in that grade when they began sub-speciality training.

is also used by surgeons in the Republic of Ireland, some states of Australia, Barbados, New Zealand, South Africa, Zimbabwe, and some other Commonwealth countries.

Most surgeons did not have a degree—in the Middle Ages they were also barbers, expert users of cutting tools—and were considered inferior and subordinate to physicians; "Mr" was initially a lower honorific, but came to be a badge of honour.

[11] In many English-speaking countries the military title of surgeon is applied to any medical practitioner, due to the historical evolution of the term.

In the United States, the Department of Labor description of a surgeon is "a physician who treats diseases, injuries, and deformities by invasive, minimally-invasive, or non-invasive surgical methods, such as using instruments, appliances, or by manual manipulation".