What Do Physician Assistants Do? Physician assistants (PAs) are health care professionals who practice medicine under the supervision of physicians and surgeons. Working as members of a health care team, PAs take medical histories, examine and treat patients, order and interpret laboratory tests and x-rays, instruct and counsel patients, make diagnoses, and prescribe certain medications. Many PAs work in primary care specialties, such as general internal medicine, pediatrics, and family …Read More