Columbia Pediatrics Providers


Erin Cudney, ARNP

Erin Cudney, ARNP is a certified pediatric nurse practitioner. She has an undergraduate degree from Cornell University and completed her Masters in Nursing at the University of Washington in 2010. Erin grew up in western New York and moved to Washington in 2000. She and her husband moved to Wenatchee in 2014 for the sunshine, the mountains, and the community. She loves taking care of children…


Peter Keyser, MD

Dr. Peter Keyser was born and raised in the San Francisco Bay Area. He graduated from Stanford University before earning his medical degree from the University of California, San Diego. He completed his pediatric training at Seattle Children's, where he was Chief Pediatric Resident. 


Shauna Hornby, MD

Dr. Shauna Hornby grew up in Lodi, California. She completed her undergraduate studies at Walla Walla College in College Place, WA. She graduated from Loma Linda University Medical School and completed her Pediatric Residency at Loma Linda University Children's Hospital.


Shelley Lisk, PA-C

Shelley Lisk, PA-C, is a physician assistant at our Columbia Pediatrics location. She enjoys getting to know families and seeing the kids grow and develop. She did her undergraduate at Cal Poly in San Luis Obispo and went to PA school at University of Southern California. Shelley grew up in the Wenatchee Valley and is excited to return to the area with her family. Shelley enjoys outdoor…


Sarah MacKay, MD

Sarah MacKay, MD, MHS, will be at our CVCH location at 933 Red Apple Road. Sarah’s medical interests include, advocacy, growth and development, dental health, health literacy, complex care, and sports medicine.