She is affiliated with St. Luke's Hospital and SSM Health. She attended UMDNJ-Robert Wood Johnson Medical School and subsequently trained at a hospital affiliated with St. Louis University (SLU) for residency. Dr. Riordan is rated 3.5 stars out of 5 by her patients. Coventry, Coventry Health Care Plans, and CIGNA Plans are among the insurance carriers that Dr. Riordan takes.