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Our Team

Meet the Reflex Knee Team

Reflex was founded in 2011 with a single focus in mind: to help you live your best, healthiest life – free of chronic knee pain by providing the best treatment options available.

Located in Portland, Oregon, the entire Reflex knee team is focused on you and dedicated to diagnosing, treating and relieving your knee pain. We are here to help restore your mobility so you can get back to your active life.

Clinic Director

Every patient that comes through the doors is an individual with their own specific cares and concerns and deserves to be treated as such. As Dr. Riggs has said, “We want Reflex patients to have a 1st Class experience.” At Reflex, the chief focus is to give every patient the best service possible at all points of treatment.

Russ Riggs, MD


Reflex Knee Doctors

The physicians here at Reflex are focused on helping you overcome your knee pain and get back to life. Our goal is to prevent or postpone the need for invasive surgical procedures.

All of our physicians are Board Certified, trained in fluoroscopy, and, between them, have decades of experience in the medical field. This means you can expect only the best care when you come in to Reflex and trust each of our knee doctors to help you make the best, most informed decisions for your treatment. Each physician is hand picked by our Clinic Director, Dr. Riggs, to ensure our patients with knowledgeable and friendly physicians who truly care about your outcome.  No matter which doctor your appointment is scheduled with you will leave  feeling informed, invigorated, and empowered.

Chad Byars, MD

Frances Lawson, MD

Samuel Kim, MD

Mark Roberts, DO


Administrative and Support Staff

The Reflex administrative team is one of our strongest assets. They are a specialized, friendly team of experienced professionals, committed to working with patients on a personal level.

This knowledgeable group is ready to help you navigate your way through the Reflex program, from scheduling appointments, to purchasing supplements or providing patients with itemized statements for insurance or tax purposes, the Reflex staff is willing and trained to assist patients however needed.

Tresa Laymon

Alysha Aronson

Thomas Hannam

Jason Teav

Michelle Gonzalez-Ramos

Kevin Rowles


If you suffer from knee pain, call us today to schedule your initial evaluation: (503) 719-6783