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Meet the Genetics Team

Children’s genetics team includes three board-certified pediatric geneticists along with highly experienced and trained pediatric nurse practitioners and genetics counselors who work together to evaluate, diagnose, and treat your child. Team members include renowned experts in evaluation of lysosomal diseases, autism, and cardiovascular conditions.



Sarah Dugan, MD, joined Children’s in 2009. She completed her medical education at Johns Hopkins University School of Medicine in Baltimore, MD and her residency in pediatrics at University of Utah Hospital in Salt Lake City, UT. She completed a fellowship in medical genetics at Stanford University Hospital in Palo Alto, CA.



Nancy Mendelsohn, MD, joined Children’s in 2002. In addition to her clinical work, she is the medical director for the medical genetics division at Children’s and an assistant professor at University of Minnesota Medical School. She completed her medical education at University of Missouri, Columbia School of Medicine, in Columbia, MO and her residency in pediatrics at Washington University St. Louis Children’s Hospital in St. Louis, MO; she then remained at Washington University St. Louis Children’s to complete her fellowship in medical genetics.



Mary Ella Pierpont, MD, PhD, completed her medical education at University of Miami School of Medicine in Miami, FL and her residency in pediatrics at Georgetown University Hospital in Washington, DC. She completed two fellowships, in pediatric cardiology and medical genetics, at University of Minnesota School of Medicine in Minneapolis.

To view recent research published by a Children’s geneticist, visit Children’s Recent Peer-Reviewed Publications and search under the physician’s name.

Nurse practitioners

Genetic counselors

  • Janice Baker, MS, CGC
  • MaryAnn Fox, MS,CGC
  • Beth Hall, MS, CGC
  • Dinel Pond, MS, CGC
  • Jennifer Roggenbuck, MS, CGC
  • Renee Temme, MS, CGC

Contact Us

  • If you are a family member and want to make an appointment, call Children’s genetics clinic at (612) 813-7240. Clinic hours are Monday through Friday from 8:00 a.m. – 4:30 p.m.

  • If you are a health professional looking for a consultation or referral information, please call Children's genetics clinic at (612) 813-7240 or Children’s Physician Access at 1-866-755-2121 (toll-free). Consultation is available 24 hours per day, seven days per week.