Physician Assistants

Todd Curtis, PA-C
Image Todd Curtis received a Bachelor of Science degree in Microbiology from the University of Montana, and a Bachelor of Science degree in Medicine from Western Michigan University.

Todd Curtis is Board Certified by the National Committee for Certification of Physician Assistants, and also holds National Certification in Clinical and Public Health Microbiology. He was a Clinical Microbiologist at Swedish Hospital and Yakima Valley Memorial Hospital, and also worked as a Lab Technician before joining ONW. He primarily assists Dr. Richard Roux in his practice.

Betsy Kean, PA-C
Image Betsy Kean received her Bachelor of Arts degree from Central Washington University. She received her Master of Physician Assistant Studies degree and Physician Assistant certificate from Idaho State University in Pocatello, ID.

Betsy Kean is Board Certified by the National Commission on Certification of Physician Assistants, and is a Fellow of the American Academy of Physician Assistants. She also currently holds a Certificate of Added Qualification in Psychiatry through the NCCPA, and has worked with the under served mental health population before joining ONW. She primarily assists Dr. John Adkison in his practice.

Tracy Keniston, PA-C
Image Tracy Keniston received her Bachelor of Science degree from Gonzaga University and her Master of Medical Science degree from Midwestern University in Glendale, AZ.

Tracy Keniston is Board Certified by the National Commission on Certification of Physician Assistants, and is a Fellow of the American Academy of Physician Assistants. She primarily assists Dr. Robert Greene with his orthopedic practice, which includes general orthopedics with an emphasis on hip and knee replacement.

Luis Ortega, PA-C, R.T.(R)
Image Luis Ortega received his radiology technologist degree from Yakima Valley Community College and his physician assistant training at the University of Washington. He also has work experience as an X-ray and CT technologist, during which time he was exposed to numerous orthopedic conditions.

Luis Ortega is Board Certified by the National Commission on Certification of Physician Assistants, and is a Registered Radiologic Technologist. He primarily assists Dr. John Hwang with his orthopedic practice. His goal is to provide Yakima Valley residents with appropriate, compassionate care.

Amy Pollock, PA-C, R.T. (R)
Image Amy Pollock received her radiology technologist (RT) degree from Yakima Valley Community College. After 12 years of working as an RT she pursued her dream of becoming a PA-C. She attended the University of Washington Medex Physician Assistant Program and obtained her Bachelor of Clinical Health Sciences degree.

Amy Pollock is Board Certified by the National Commission on Certification of Physician Assistants, and is a Fellow of the American Academy of Physician Assistants. She also is a member of the Washington Academy of Physician Assistants. Amy primarily assists Dr. Gene Griffiths with his orthopedic practice.

Shane Sigler, PA-C
Image Shane Sigler attended Whittier College in southern California and received his Bachelor of Arts degree from the University of Puget Sound. He worked as a Certified Athletic Trainer at the high school, college, and professional sports levels. He then received his Bachelor of Clinical Health Sciences degree from the University of Washington Medex Physician Assistant program.

Shane Sigler is a Board-Certified Physician Assistant who works primarily with Dr. Thomas Kennedy in his orthopedic practice, treating conditions of both the knee and shoulder as well as general orthopedic conditions. He also is an active member of the White Pass Volunteer Ski Patrol.

Kevin Walkenhauer, PA-C
Image Kevin Walkenhauer received his Bachelor of Arts degree in Biology from Central Washington University. He earned a Master’s degree in Physician Assistant Studies from A.T. Still University in Mesa, AZ. He worked in physical therapy before doing his PA training.

Kevin Walkenhauer is Board Certified by the National Commission on Certification of Physician Assistants, and is a Fellow of the American Academy of Physician Assistants. He primarily assists Dr. DeMill with his orthopedic practice.
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