A medical college is a trade association that brings together practitioners of a particular geographical area (a country, region, province). In common-law countries, they are often grouped by medical specialties (cardiologists, family doctors, etc.).
Medical associations act as a safeguard of the fundamental values of the medical profession: the deontological ethics and code of ethics. In addition to providing exclusive representation in national and international medical practitioners, a medical college is responsible for management and protection of the medical profession.
In most countries, licensing is usually required. A professional or college official is a public corporation of an industry association composed of persons exercising liberal professions and calls are usually covered by the state. Associate members are known as colleges.
In ancient Rome, the college was understood by the name of Colegium the company public law with legal personality, formed by a plurality of persons with the same trade. For its formation is needed at least three people, but to continue their activity sufficient one. It is believed that Opificum o Societate colleges, from which the current Official Colleges, were derived from the associations of commoners to achieve benefits similar to those enjoyed by the patricians, needed a special authorization from the Emperor or the Senate to take legal personality. The government and the administration were chosen at a meeting of all participants. From Alexander Severus, these associations are transformed to free compulsory, children should follow the profession of his father.
These first colleges were characterized by common purpose to prevail over private interests. In Europe, and specifically in Spain, colleges and professional associations have a long tradition through the centuries, interrupted only by the French Revolution, which in its ideology advocating that there should be one between the citizen and the state. This suppression of the early nineteenth century was changing throughout the century, returning to the end of her rebirth.
Currently, a professional association is a public corporation of an industry association composed of persons exercising professions calls, and are usually covered by the state. Associate members are known as colleges. When dedication is directed to manual or craft activities used the traditional name of guild. 
Medical Colleges 
- American Board of Family Medicine
- Asociación Médica del Departamento Castellanos
- Colegio Americano de Reumatología
- Colegio de Médicos y Cirujanos de Costa Rica
- Colegio Médico de Chile
- College of Family Physicians Canada
- Royal College of Physicians and Surgeons of Canada
- Conseils de l'ordre des médecins en France
- Fédération des médecins suisses
- General Medical Council (UK)
- Ordre des médecins (Belgique)
- Organización Médica Colegial de España
- Royal College of General Practitioners (UK)
- Royal College of Obstetricians and Gynaecologists (UK)
- Royal College of Physicians (UK)
- Royal College of Physicians of Edinburgh
- Royal College of Physicians of Ireland
- Royal Australian College of General Practitioners
- Royal New Zealand College of General Practitioners
- La sociedad no puede recibir los mismos beneficios de la profesión médica sin los Colegios de Médicos. II Congreso de la Profesión Médica. Madrid, 16 y 17 de abril 2010.
- Garrote Díaz JM. El médico ante la sociedad: la colegiación necesaria. Discurso de ingreso como académico correspondiente de la Real Academia de Medicina de Salamanca. 2010/12/14.
- History of the Academy. Academy of Medical Royal Colleges.