Page ContentKelsey-Seybold Rheumatology Video Gallery Fayyaz Ahmed, MD | Rheumatology | Kelsey-Seybold Fayyaz Ahmed, MD, specializes in Rheumatology and provides care for patients at Kelsey-Seybold Clinic in Houston. Houston Rheumatologist Dr. Kirkwood Johnston Kirkwood Johnston, M.D., is a rheumatologist and cares for his patients at Kelsey-Seybold Clinic's Main Campus, the Downtown at the Shops Clinic, and at the Pearland and Clear Lake clinics. Houston Rheumatologist Dr. Francis Williams Francis Williams, M.D. is a Rheumatologist and cares for his patients at Kelsey-Seybold Clinic's Main Campus, Summer Creek Clinic in Humble, and at the Meyerland Plaza Clinic. Houston Rheumatologist Dr. Mario Lamothe Mario Lamothe, M.D., FACR, is a rheumatologist and cares for patients at Kelsey-Seybold Clinic's Main Campus, Tanglewood Clinic, and at the Fort Bend Medical and Diagnostic Center.