Dr. MacMillan grew up in Merritt Island and graduated from Merritt Island High School. She obtained her Bachelor of Science in Chemistry from the University of South Carolina in Columbia, South Carolina.
After graduating from Virginia College of Osteopathic Medicine in Blacksburg, Virginia, Dr. MacMillan completed her internship and residency in St. Petersburg, Florida at Northside Hospital and Tampa Bay Heart Institute.
Dr. MacMillan is a traditional Internal Medicine physician who cares for her patients both at her office and in the hospital. Dr. MacMillan has hospital privileges both at Holmes Regional and Wuesthoff-Melbourne.
Dr. MacMillan is Board Certified in Internal Medicine by the American Osteopathic Board of Internal Medicine.