Dr. Alexandra Nicole Theisen, MD

Dr. Alexandra Theisen is a rheumatologist who specializes in diagnosing and treating conditions that affect joints, muscles, and the immune system. She earned her medical degree from Southern Illinois University School of Medicine and brings 10 years of experience to her practice. Her expertise focuses on helping patients manage complex autoimmune and inflammatory conditions.

Dr. Theisen is affiliated with Riley Hospital for Children at Indiana University Health and practices across multiple locations in Saint Louis, Missouri. She treats patients with joint pain, knee problems, and systemic lupus erythematosus. Her approach includes physical therapy and strength training to help patients maintain mobility and function. She also utilizes immunology and serology testing to accurately diagnose and monitor autoimmune conditions.