Medical fellowship

A fellowship is the period of medical training in the United States and Canada that a physician or dentist may undertake after completing a specialty training program (residency). During this time (usually more than one year), the physician is known as a fellow. Fellows are capable of acting as attending physician or consultant physician in the generalist field in which they were trained, such as internal medicine or pediatrics. After completing a fellowship in the relevant sub-specialty, the physician is permitted to practice without direct supervision by other physicians in that sub-specialty, such as cardiology or oncology.

In the USA, the majority of fellowships are accredited by the Accreditation Council for Graduate Medical Education ("ACGME"). There are a few programs that are not accredited as well, and are actually well received given that it is more important to be board certified for the primary specialty as a physician, and fellowship quality is often more based on research productivity.

The following are organized based on specialty required for the fellowship.

¹ Not officially recognized as a subspecialty by the American Board of Obstetrics/Gynecology or the American College of Obstetrics/Gynecologists.

There are a number of programs offering a combined fellowship, training in two or more sub-specialties as part of a single program.

...
Wikipedia