Allison Biggerstaff

Allison Pedersen


After obtaining her Master’s degree from Morningside College in 2020, Allison began working as a Nurse Practitioner in the Podiatry department here at CNOS. She works alongside Orthopaedic Surgeon, Dr. David Rettedal, specializing in treating foot and ankle pathologies and injuries clinically and surgically.

Prior to obtaining her Masters Degree as a Nurse Practitioner, Allison worked as a registered nurse in pediatric home health and in the operating room at Mercy Medical Center in 2014. During this time, she worked to  receive her Bachelors degree from Briar Cliff University in 2017. She also specialized in cardiovascular surgery and became a Certified Nurse of the Operating Room as well.

Allison grew up in a small town in Iowa and currently resides on a farm in the rural Sioux City area. She loves to spend her free time with her husband and their seven children. They enjoy attending youth athletics and activities, spending time outdoors, and making memories traveling.



  • Board Certified by the ANCC as a Family Nurse Practitioner.
  • Nursing experience includes pediatric home health, long term care, and general/cardiovascular surgery.
  • Certified Nurse of the Operating Room (CNOR)

Background Information

Clinic Locations
  • Graduate: Masters Degree, Nurse Practitioner (Morningside College 2022)
  • Undergraduate: Bachelors Degree, Registered Nurse (Briar Cliff University 2017)

Patient Testimonials