The next time you visit your primary care provider, take a look at his or her nametag. Is your caregiver an MD, a PA, a DO or an NP? Years ago, your caregiver most likely would have been a doctor of medicine (MD). Today there's a good chance your primary caregiver is a physician assistant (PA), doctor of osteopathy (DO) or nurse practitioner (NP). What's more, if you see an MD or a DO, he or she may be a family practitioner, internist or pediatrician. 

  So which health care provider is best for you? Here are some descriptions of various health care professionals that you may see at your primary care office. 
Family Physician

  A family physician is trained to treat every member of your family. Family practice provides comprehensive care for all age groups, both sexes, each organ system and all diseases. The American Board of Family Physicians requires family physicians to obtain 300 hours of continuing medical education every six years in order to be re-certified.
Internist

  An internist deals with disorders of internal body structures. Internal medicine physicians concentrate on the care of adolescents and adults, including general medical problems and preventive health care services. Many specialize in specific organ systems. 
Doctor of Osteopathy

  A doctor of osteopathy is a physician trained to understand the interaction among all the body systems. A DO focuses on the neuro-musculoskeletal system and may perform muscle and skeletal manipulations to treat problems. Unlike conventional medicine, classic osteopathy uses drugs or surgery only if other measures haven't worked. Some DOs may incorporate diagnostic and treatment techniques of conventional medicine, such as lab tests and prescribing medication.
Pediatrician

  A pediatrician is a physician who specializes in the health care of children, generally from birth to age 21. Primary care pediatricians complete three years of pediatric residency following medical school. Some pediatricians may also continue their education in subspecialties such as adolescent or neonatal medicine.
Physician Assistant

  A physician assistant (PA) is a health care professional licensed to practice medicine under the supervision of a practicing physician. A PA can provide a range of patient services from physical exams to surgical procedures. Physician assistants attend intensive education programs by the Commission on Accreditation of Allied Health Education and Accreditation. 
Nurse Practitioner

  A nurse practitioner (NP) is a registered nurse who has advanced education and clinical training in a health care specialty. Nurse practitioners can diagnose and treat common illnesses and minor injuries and in most states can prescribe medicine. Nurse practitioners may also specialize in family, pediatric, adult and geriatric fields.