A Medicare Supplement (Medigap) policy is health insurance sold by private insurance companies to fill the gaps in Original Medicare Plan coverage. Medigap policies help pay some of the health care costs that the Original Medicare Plan doesn't cover.
Internal Medicine encompasses the care of all adults, healthy and sick. Internists (as all doctors who complete an internal medicine residency are called) can be generalists or subspecialists, like cardiologists or rheumatologists. If you choose not to subspecialize, you are known as a General Internist.
Internists are physicians specializing in internal medicine, a discipline focused on the care of adults emphasizing use of the best medical science available in caring for patients in the context of thoughtful, meaningful doctor-patient relationships as exemplified by the life and work of Sir William Osler, the father of internal medicine in the United States.