When you see the letters FACP after your physician’s name, they mean that he or she is a Fellow of the American college of Physicians (ACP), the largest society of internists in the world. Fellows of ACP are a distinguished group of doctors dedicated to continuing education in medical practice, teaching, or research. Fellowship is an honorary designation given to recognize ongoing individual service and contributions to the practice of medicine. Fellowship in ACP is a mark of distinction. It says that your doctor has made special efforts to be a better doctor through activities such as teaching, hospital appointments, public service, continuing medical education, publishing scientific articles, and advanced training. Ultimately, it says your doctor cares about delivering high-quality health care.