About our practitioners

Our practitioners specialize in the evaluation and treatment of patients with mobility issues. They are all graduates of the University of Washington’s Prosthetic & Orthotic program, and are licensed by the American Board for Certification in Orthotics, Prosthetics, and Pedorthics and the State of Washington. Between them, they have more than 60 years of experience in advanced prosthetic and orthotic treatments for pediatric and adult patients. 

Cindy Diener, CPO/LPO

Certified Prosthetist Orthotist

I’ve been working at Cascade P&O since April of 1994, after graduating from the University of Washington with a B.S. in Prosthetics and Orthotics. What began as an internship at Cascade has now blossomed into a full-time career.

Ferndale Office

Phone: 360-384-1858
Toll-Free: 800-848-7332
View Map & Driving Directions

Mount Vernon Office

Phone: 360-428-4003
Toll-Free: 800-428-4003
View Map & Driving Directions

Debbie Donaldson, CPO/LPO

Certified Prosthetist Orthotist

I graduated from the University of Washington in 1992 with a Bachelor of Science degree in Prosthetics and Orthotics. I was first introduced to Prosthetics and Orthotics at a very young age by my mother, who made prosthetics and orthotics for people in need in India.

Larry Paise, CPO/LPO

Certified Prosthetist Orthotist

People often wonder how I got interested in this unique field of Orthotics and Prosthetics. I spent an afternoon observing at a P&O clinic during my senior year in high school. When I saw a resilient 7-year- old boy run out of the office on his refurbished prosthetic leg, I knew this was what I wanted to do!

Don Buethorn, CPO/LPO

Founder and Owner

After first earning a Special Education degree from Western Washington University, I decided to pursue the field of prosthetics and orthotics. I returned to school at the University of Washington School of Prosthetics and Orthotics and graduated in 1980.

Can’t say enough about the staff.

"I can't say enough about the staff. I felt like my outcome was top priority for them."

Such professionalism and service.

"Had a wonderful experience! Great to have a local company like this, with such professionalism and service."

Referring others to you.

"My experience with your group was very good. I have referred others to you!"

Very comfortable, easy to care for, and use.

"Cindy was very pleasant, kind, and professional – she made me feel very comfortable. She took the time to explain everything I needed to know for the use and care of my brace. My physical therapist was very pleased. The brace was easy to use and did...