Asa Peterson, MD

Dr. George Thieroff is a rheumatologist who sees pediatric and adult patients of all ages with complex rheumatologic conditions. He diagnoses and treats various conditions, including juvenile idiopathic arthritis (JIA) and rheumatoid arthritis (RA), which affect the joints, muscles, bones, and connective tissues, causing pain and inflammation. Dr. Thieroff is an assistant professor with the Division of Rheumatology in the Department of Internal Medicine at Saint Louis University School of Medicine.

Ananya Pathak, APRN, FNP, is a family nurse practitioner who provides comprehensive primary care services for adult patients, ages 18 and older. She is focused on the prevention, diagnosis, and management of acute and chronic conditions as well as preventative care and routine health screenings. Ananya is passionate about helping her patients feel better and live healthier lives, building trust with them and working together to manage their health and wellness. She educates her patients and helps them take ownership of their health, giving them the tools and resources they need to thrive. Ananya is with the Department of Internal Medicine, Division of General Internal Medicine, at Saint Louis University School of Medicine.

Dr. Carlos Portales Castillo is an infectious disease specialist who provides consultations - both inpatient and outpatient - for patients ages 18 and older. Some of the infectious diseases he has treated include actinomycosis, osteomyelitis, and Lyme disease. He also specializes in transplant infectious diseases. Dr. Portales Castillo provides the best, most up-to-date, evidence-based care for patients, particularly those with complicated infections and compromised immune systems. Dr. Portales Castillo is an assistant professor with the Division of Infectious Diseases, Allergy & Immunology in the Department of Internal Medicine at Saint Louis University School of Medicine.