O'Neal, Laura, Elizabeth

A board-certified cardiac electrophysiologist and cardiologist, Peter Mikolajczak, MD, attended medical school at Saint Louis University School of Medicine where he completed his internal medicine residency, as well as his fellowship in cardiovascular disease. In addition, he completed a fellowship in clinical cardiac electrophysiology at University Hospitals Cleveland Medical Center. Dr. Mikolajczak has published more than 10 peer-reviewed articles.

Caryn Yeager, CPNP, is a board-certified nurse practitioner at SSM Health Cardinal Glennon Children’s Hospital. She received her Bachelor of Science in Nursing from Central Methodist University and her Master of Science in Nursing from Maryville University. Caryn sees newborn patients to 18 years old and has a special interest in breastfeeding and breastfeeding education. She splits her time between the SSM Health Cardinal Glennon Pediatrics offices located throughout north county, Troy and Warrenton.

Emily Machens is a board certified Family Nurse Practitioner. She earned her bachelor of science in nursing from Southern Illinois University Edwardsville and graduated magna cum laude. She also completed a doctorate of nursing practice, specializing in family medicine from Southern Illinois University Edwardsville. Emily has worked as a telemetry nurse at SSM Health DePaul Hospital since 2015 and also in the endoscopy lab assisting Drs. Mohrman and McDonough during procedures since 2016. Emily has special interests in Gastroesophageal Reflux Disease (GERD), Irritable Bowel Syndrome (IBS), colon cancer and hepatitis C screenings.