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Arthritis Northwest PLLC

Rheumatology located in Spokane, WA & Spokane Valley, WA


Now at two locations!

After over 32 years of practicing Rheumatology in Spokane, Dr. Butler is retiring on April 30, 2024.

As of January 1, 2025, we will no longer accept Idaho Medicaid or Amerigroup insurances.

About Our Practice

Provider working with patient

The highly experienced rheumatologists at Arthritis Northwest PLLC in Spokane, Washington, believe that the best treatment outcomes require a comprehensive partnership involving patients, physicians, and their clinical teams.

When Arthritis Northwest PLLC opened its doors in 1991, it envisioned creating a practice that combined clinical excellence and compassionate care with state-of-the-art technology.

In the years since then, that dream has become a reality. Now the team at Arthritis Northwest PLLC is looking toward the future, continuing the search for new ways to deliver quality care and innovative treatment solutions to their patients.

The practice’s board-certified, fellowship-trained rheumatologists specialize in diagnosing and treating conditions like arthritis and related autoimmune disorders. Patients benefit from their expertise in arthritic conditions such as rheumatoid arthritis, ankylosing spondylitis, psoriatic arthritis, gout, and osteoarthritis.

The highly skilled physicians at Arthritis Northwest PLLC also treat a range of autoimmune disorders such as vasculitis, systemic lupus erythematosus, and Sjögren’s syndrome, as well as less well-known diseases like pseudogout, polymyalgia rheumatica, Behçet's disease, axial spondyloarthritis, systemic sclerosis, and giant cell arteritis.

To support the work of the rheumatology team, Arthritis Northwest PLLC has its own in-house laboratory equipped with the latest technology, specifically designed to handle complex immunological tests.

The team of certified lab technicians and assistants delivers high-quality, patient-focused care and is often able to provide test results the same day. Arthritis Northwest PLLC also has an in-clinic imaging department where patients can go for convenient digital X-rays.

Patients who require IV therapy to receive their medications can take advantage of Arthritis Northwest PLLC's comfortable, relaxing infusion suite, staffed by compassionate nurses. The practice also partners with naturopathic doctor Christopher M. Valley, ND, whose Natural Wellness Center is just above the main clinic.

For expert, specialist care of rheumatological conditions, call Arthritis Northwest PLLC today to book an appointment or visit us online.


Arthritis Northwest was founded on the idea that the best treatment comes from a comprehensive partnership between patients, their physicians and clinical teams.



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Our providers are at the forefront of rheumatology treatment.

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Call Today to Request Your Appointment

Call Today to Request Your Appointment

Most Major Insurance Plans Accepted

Arthritis Northwest PLLC accepts most major insurance plans. Here is a list of some of the major insurance plans we accept. If you do not see your insurance plan listed, please call our office to confirm.

Blue Cross Blue Shield

Words from our patients

  • Google

    "They corrected my misdiagnosis and changed my life! Everyone there has been amazing to work with."

    Adrienne D.
  • Google

    "Dr Valley has treated both my daughter and I, over the years. We both agree that he is the best of the best."

    Karlicia B.
  • Google

    "I had a wonderful experience at arthritis northwest as a new patient. All of the staff (check-in, nurses, phlebotomists, X-ray technicians and Dr LaSalle) were amazing!"

    Marie N.
  • Google

    "I have been going to Dr. Butler for many years and they are always thorough, helpful, and pleasant."

    Esther C.
  • Google

    "Dr. Muller has been the best , he knows how to diagnose what the issues are and his treatment has been the best,..."

    Anna F.
  • Google

    "I have been going to Dr. Mueller for 2 years now and I can't say enough good things about him or the staff."

    Tina N.
  • Google

    "I have been a patient of Dr. Butler since 1998. I followed him to Arthritis Northwest from Rockwood Clinic and have never had any problems that couldn't be worked out. "

    Cinde M.

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