Dr. Jonathan Preiss

Owner and Clinic Director

Dr. Preiss graduated Cum Laude (with honors) from Portland’s own University of Western States in 1985 with his continuing education and practice ever-evolving over the years. He received his acupuncture physician's license in 1991. In 1993, he completed his specialty in chiropractic orthopedics. While Dr. Preiss still maintains active patient treatment, much of his time is dedicated to managing his growing clinic of excellent doctors and his world-class administrative team to provide the finest health care experience to our dedicated patients.

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Dr. Chelsea Durling

Doctor of Chiropractic

Dr. Chelsea Durling was born and raised in Calgary, Alberta, Canada, where she developed a love for sports and human movement. She grew up playing every sport she could, including soccer, basketball, badminton, golf and swimming. Throughout her competitive years, she sustained a handful of injuries and eventually found herself in a chiropractic clinic receiving care. This led to the eventual desire to attend the University of Western States, earning a Doctorate in Chiropractic.

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Ulyssa Preiss

Office Manager, Chiropractic Assistant

As the Office Manager, Ulyssa is frequently one of the first points of contact for our patients at Chiropractic Art & Science. Her goal is to make each and every patient feel welcomed and excited about receiving care in our office from the first phone conversation and beyond. She oversees appointment scheduling, financial care plans, health insurance verification, and communications while maintaining an environment where wellness and recovery of our patients can flourish.

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Maddy Valenzuela

Senior Patient Coordinator

As the Patient Coordinator, Maddy is one of the first points of contact for our patients at Chiropractic Art & Science. Her goal is to keep all of our practice members on their prescribed care program and to assist them in accommodating their busy schedules. She also helps with financial arrangements and assists our patients with understanding their insurance benefits. She will ensure our practice members have a stress-free experience in our peaceful and nurturing environment.

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Risa Barzilai

Senior Billing Specialist

Risa's role at Chiropractic Art & Science is world-class Billing Specialist. Her main focus is to ensure patient accounts are accurately billed to insurance companies and to maintain timely reimbursements for services. She is dedicated to keeping and maintaining current account receivables.

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Natalie Brehm

Assistant Office Manager, Chiropractic Assistant

Natalie is one of the newest team members in our growing office here at Chiropractic Art & Science. As the Assistant Office Manager, Natalie supports the whole team by offering a friendly and professional level of support. She oversees all aspects of the office, assisting where needed from answering the phones and scheduling appointments, to answering financial plan questions and handling health insurance communications. She is one of the first points of contact for our patients, making each patient feel welcome with her friendly smile.

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Christine Gray

Patient Coordinator

Christine began as a patient of Chiropractic Art & Science and is now part of our office team. She has experienced firsthand how chiropractic care can improve your quality of life and is excited to assist our patients throughout their journey, coordinating their appointments to ensure they receive consistent care for maximum personal benefit. With 16 years of intensive ballet training and the continual stressors that come with life, Christine continues her regular care plan while bringing empathetic energy to the office.

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