The Oklahoma Center for Arthritis Therapy & Research, Inc.

Dr. Ellen Zanetakis is a Rheumatologist certified by the American Board of Rheumatology and is also board certified in Internal Medicine. She has special interests in diseases of the joints, muscles, osteoporosis and connective tissue diseases. She received her Doctorate from Northeastern Ohio University College of Medicine and performed her Residency at Akron City Hospital. This was followed by a Rheumatology Fellowship at Cleveland Metropolitan Hospital and Case Western Reserve Hospital. Dr. Zanetakis is a Clinical Associate Professor of Medicine at the University of Oklahoma College of Medicine. She is a member of the Oklahoma State Medical Society, Tulsa County Medical Society and a Fellow in the American College of Rheumatology. She was a past National Delegate for the Arthritis Foundation and past Chairman of the Arthritis Foundation. Dr. Zanetakis has conducted and continues to participate in multiple research studies on new medications for the treatment of Rheumatoid Arthritis, Systemic Lupus Erythematosus,  Osteoarthritis, and Osteoporosis. 

Dr. Carrie Gilstrap is a board certified Rheumatologist  with special interest in inflammatory types of arthritis (Rheumatoid Arthritis, Psoriatic Arthritis, Ankylosing Spondylitis, etc.) and Osteoporosis. She completed her medical school training at Kansas City University of Medicine and Biosciences in 2004  and completed her Internal Medicine Internship and Residency at Oklahoma State University Medical Center in Tulsa in 2007. She served as Chief Resident during her residency and was named "Resident of the Year" at OSU Medical Center in 2007. She went on to pursue a Rheumatology Fellowship at Plaza Medical Center in Ft. Worth, Texas, which she successfully completed in 2009. She also served as Chief Rheumatology Fellow during her Rheumatology training. Dr. Gilstrap is a member of the American College of Rheumatology, American Osteopathic Association, Oklahoma Osteopathic Association and American College of Osteopathic Internists. She serves on the American Osteopathic Board of Internal Medicine.

Amy Harrison, PA-C is a board certified Physician's Assistant with over 5 years experience in Internal Medicine, and subspecialty experience in Rheumatology.  She is originally from Durant, Oklahoma.  She received her Undergraduate degree from the University of Oklahoma in Norman.  Amy received her Physician's Assistant's degree from the University of Oklahoma in Oklahoma City. Her interests include Rheumatoid Arthritis, Lupus, Psoriatic Arthritis,  and Osteoporosis. She also has an interest in Musculoskeletal Ultrasound and has completed training in the Knee, Hand, and Foot. She has extensive experience and knowledge in the treatment of Rheumatic Diseases and the various therapies available today. She works closely with Dr. McKay on all of his patients. 


Dr. James McKay is board certified in Rheumatology and Internal Medicine.  He is a native of Texas, who located to Oklahoma several years ago. He received his Doctorate from A.T. Still University in Kirksville, Missouri. He completed his Internal Medicine Residency at Oklahoma State University Medical Center. Subsequently he completed a Fellowship in Rheumatology at  the University of Missouri  Hospital and Clinics in Columbia, Missouri. There he was awarded the Joseph P. Green Fellowship Award for Excellence. Dr. McKay has been Adjunct Clinical Professor of Medicine at Oklahoma State University Center for Health Sciences for over 20 years where he has trained numerous Residents in Internal Medicine and Family Practice.  He is a Fellow of the American College of Rheumatology and the American College of Osteopathic Internal Medicine. He was voted "Rookie of the Year" in 1993 by the Eastern Oklahoma Chapter of the Arthritis Foundation. He was chosen as "Researcher of the Year" by the American College of Osteopathic Internal Medicine in 2005. He is a member of the Oklahoma Osteopathic Association, the Tulsa Osteopathic Medical Society, the American College of Osteopathic Medicine, and the American College of Rheumatology. He is active in the Oklahoma Lupus Association,  the Arthritis Foundation, and serves on the Medicare Advisory Board for Oklahoma.  Dr. McKay is also active in Clinical Research and has had publications in Arthritis and Rheumatism, The Journal of Rheumatology, and other peer reviewed literature. He has presented at the American College of Rheumatology Annual Meetings, National, and International conferences. He has a diverse interest in several Rheumatic diseases including Lupus, Rheumatoid Arthritis, Autoimmune Eye Disease, Osteoporosis, and Musculoskeletal Ultrasound.