Diagnose and provide non-surgical treatment of diseases and injuries of internal organ systems. Provide care mainly for adults who have a wide range of problems associated with the internal organs.

Education: Most of these occupations require graduate school. For example, they may require a master's degree, and some require a Ph.D. or M.D.

Expereince: Extensive skill, knowledge, and experience are needed for these occupations. Many require more than five years of experience. For example, surgeons must complete four years of college and an additional five to seven years of specialized medical training to be able to do their job.

Training: Employees may need some on-the-job training, but most of these occupations assume that the person will already have the required skills, knowledge, work-related experience, and/or training.

• Attending Physician, Clinic MD Associate (Clinic Medical Doctor Associate), Gastroenterologist, General Internist, Internal Medicine Doctor, Internal Medicine Physician, Internist, MD, Medical Doctor (MD), Physician