About Us

  Bonhoeffer Rheumatology Institute, is an advanced practice Rheumatology clinic dedicated to treating rheumatologic disease, fibromyalgia and osteoporosis.  This clinic follows evidence based medical practice, the ever changing treatment protocols of the American College of Rheumatology and the recommendations of Integrative Medicine for lifestyle modifications of persons living with  an autoimmune disease or fibromyalgia. The treatment goal of the Bonhoeffer clinic for each patient is always disease remission in order to resume full participation in their family, career and social life.


W Richard Horn, NP

Rheumatology Specialist

W Richard Horn, NP is the clinic owner and health care provider. Richard is a Rheumatology Specialist and Nurse Practitioner licensed in the state of Arizona with over 6 years of experience treating patients in Rheumatology, having studied under the direction of his mentor, Dr. Michael Fairfax, a Rheumatologist with over twenty-five years of experience.  Richard continues his association with Dr. Fairfax by assisting him with several research protocols at Arthrocare Arthritis Care and Research, P.C.  He collaborates with other Rheumatologists and physicians of other specialties where indicated to develop individualized patient treatment plans that provide the best hope in reaching the target goal of disease remission.           

Prior to specializing in Rheumatology, Richard worked for over nine years in emergency medicine primarily with the Indian Health Service and the University of Arizona Medical Center Emergency Department.  In 2004 Richard retired from the US Air Force Medical Reserves ending a military career that began as a member of the US 3rd Marine Division.   


Richard holds the following academic degrees: Master in the Science of Nursing/Family Nurse Practitioner, Certificate of completion from the Advanced Rheumatology post-graduate course of The American College of Rheumatology, Bachelor of Science in Nursing, Masters of Library and Information Science and Bachelor of Arts in Economics.  The Universities where he studied include: The University of Maryland, University of Missouri at Kansas City, The Internal Christian University in Japan, University of Missouri at Columbia, Missouri, Regents College of the State of New York and the University of Phoenix. 

W Richard Horn, NP

Rheumatology Specialist

William Mitchell

Naturopath, ND

I work with men and women with Rheumatologic disease ready to get their health back. There are many ways these diseases could be effecting you. You might feel depressed, sad, irritable or anxious. You don't have the energy to do the things that you love to do and the little you can do doesn't bring you the joy it used to. Or perhaps you have tremendous joint pain and stiffness, can hardly get out of bed and the thought of losing your independence terrifies you. You could be a future mother, who dreams of having children is continuously crushed by recurrent miscarriages. 


I listen to you, so that we can find a strategy to get your energy back, get you out of bed more easily, allow you to fully experience joy out of the things that matter in your life, and maintain your independence with as little reliance on meds as possible. Conditions treated: Lupus, RA, Psoriasis, Ankylosing Spondylitis, Crohn's, Colitis, Myositis


I consider my patients an extension of my family. The last person I want to be is simply some scary man in a white lab coat you see for your condition. You can take rest in the fact that I'm here to listen to you and help you in any way I can.