Dr. Rieger is board certified by the American Board of Pediatrics and is a Fellow of the American Academy of Pediatrics. She graduated from Columbia College/Columbia University with a bachelor of arts degree in history and studied European history at Cambridge University, England. She received her medical degree from Albert Einstein College of Medicine and went on to complete her post-graduate studies and pediatric residency at Montefiore Medical Center. She also worked in the pediatric emergency room at The Children's Hospital at Montefiore and acted as a preceptor for pediatric residents at the same institution.

While in private practice with a pediatric group in Pelham, Dr. Rieger began working as a part-time pediatrician with Westmed Medical Group, which is now Summit Health, in April 2010 and became a full-time physician in January 2011. She sees patients at 210 Westchester Avenue in White Plains. Her current affiliations are with White Plains Hospital and Greenwich Hospital.

Dr. Rieger lives in Westchester with her family. Her personal interests include biking, travel and literature.