Peggy Modaff, MS, CGC

Position title: Genetic Counselor

Peggy Modaff, MS, CGC


Peggy Modaff, MS, CGC, is a certified genetic counselor in multiple clinics.  She received her BS in genetics and MS in medical genetics from the University of Wisconsin-Madison and has been at the Waisman Center since 1995. She has special interest and experience in skeletal dysplasias and has served on the Little People of America Medical Advisory Board since 2022. In addition to the Bone Dysplasia Clinic, Peggy also works in the Pediatric Bone and Mineral Metabolism Clinic.


Professional Certifications and Education

  • BS, University of Wisconsin-Madison
  • MS, University of Wisconsin-Madison
  • American Board of Genetic Counseling
  • Distinguished Clinical Genetic Counselor