Raymond Wynne Phillips, M.D. was born in Ft. Bragg (now Ft. Liberty) North Carolina, and traveled throughout the United States and abroad as the son of a career Army officer. He attended Princeton University on an Army ROTC scholarship and graduated with honors in 1977. He earned his medical degree in 1981 from Washington University in St. Louis, Missouri. Dr. Phillips completed his internship and residency in Internal Medicine at Thomas Jefferson University Hospital in Philadelphia, Pennsylvania, where he remained for an additional year as Chief Resident.

In 1985 he was assigned to the US Army Hospital at Ft. Leonard Wood, Missouri, where he served as Chief of Internal Medicine for two years.  He completed his Gastroenterology Fellowship at Walter Reed Army Medical Center in Washington D.C. from 1987 to 1989. Dr. Phillips remained at Walter Reed as Assistant Chief of the Gastroenterology Service and received an academic appointment at the Uniformed Services University for the Health Sciences as Assistant Professor of Medicine. Dr. Phillips has been in clinical practice in Naples since 1991 and has been participating in clinical research since 2003.

Dr. Phillips has been a member of the staff at both Naples Community Hospital and its North Collier Hospital since 1991. He was chairperson of the Department of Medicine at North Collier Hospital in 1996. Dr. Phillips is a Diplomate of the American Board of Internal Medicine and is board certified in Gastroenterology. He is a member of the American Gastroenterological Association. In 2020, he was named Physician of the Year by the Collier County Medical Society.

In December 2021, Dr. Phillips retired from his practice at Gastroenterology Group of Naples to focus his attention on clinical research at GI Pros Research. He volunteers as a gastroenterologist at the Neighborhood Health Clinic in Naples. In addition, he is on the board of the Southwest Florida Healthcare Network.