Thank you for choosing Clayton Medical Associates, P.C. for your medical care. We strive to make your visit to our office as easy and comfortable as possible. Please feel free to browse our website as it contains valuable information about our office. We have created an on-line registration and appointment-scheduling feature to make your experience with our office go a little smoother.

John Budd III, M.D., Sona Kamat, M.D, and Chad Ronholm, M.D. are all board certified in Rheumatology. Clayton Medical Associates is located at 6400 Clayton Rd., Suite #110, St. Louis, MO 63117. If your treatment requires a hospital stay, we are right next door to SSM St. Mary’s Hospital and use their hospitalists to care for our patients. We have a Quest Diagnostics and MOBAP laboratory on site.

We accept almost all insurance carriers and welcome inquiries about whether or not your carrier is accepted. We will submit claims to marketplace plans but are out of network for most of them. Unfortunately, we do not accept any form of Medicaid at this time.




Every year October 6-12 is designated as PA appreciation week through the American Academy of Physician Assistants. We are proud to have these four wonderful PAs as part of our CMA family so that we can bring the highest quality Rheumatology care to our patients.

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Dr. Ronholm is now with CMA full time. He is an experienced Rheumatologist and can see patients within one week if needed. If you would like to schedule an appointment with him, use the appointment scheduling tab or give us a call and we will be glad to make an you an appointment to see […]

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CMA is excited to announce that we are transitioning to EPIC on June 5, 2017. EPIC has a great patient portal called MyChart which will allow patients to have access to much more information and tools in their personal chart. Please help us make this as smooth of a transition as possible by making sure […]

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Spring allergy season is right around the corner. Remember to ask your provider about taking over-the-counter allergy medications to make sure they do not negatively interact with your other medications. Happy Spring!  

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