Our Providers
Our providers are experts in internal medicine who focus on the prevention, diagnosis and treatment of adult diseases. As Washington University physicians, we are part of the Washington University academic medicine team. This means, when needed, our patients have access to nationally-ranked specialists, state-of-the-art facilities and the latest applications of clinical research.
Katharine L. Cella, FNP
Master’s Degree: Master of Science, Nursing: Vanderbilt University School of Nursing
Clinical Interests: Internal medicine, primary care of adults including chronic disease and acute illness management; diabetes, hypertension and hyperlipidemia management

Stephen Fuest, MD
Medical Degree: Washington University School of Medicine, St. Louis, MO
Residency: Washington University School of Medicine, St. Louis, MO
Clinical Interests: Transitions of care, medical education

Peter McDonnell, MD
Medical Degree: University of Michigan
Residency: Washington University School of Medicine, St. Louis, MO
Clinical Interests: Primary care and internal medicine for men and women including management of diabetes, heart conditions, and other chronic diseases

Jennifer Schmidt, MD
Medical Degree: Saint Louis University School of Medicine
Residency: Medical College of Wisconsin
Clinical Interests: Preventive medicine, chronic disease management
Heidi Tastet, MD
Medical Degree: Loma Linda School of Medicine
Residency: Florida Hospital
Clinical Interests: Lifestyle medicine, global public health and chronic diseases

Sarah Tremain-Hartmann, AGNP-C
Master’s Degree: Master of Science, Nursing: University of Missouri, St Louis, MO
Clinical Interests: General primary care, preventative medicine, chronic disease management

Elizabeth Walden-Prater, NP-C
Master’s Degree: Master of Science, Nursing, Saint Louis University
Clinical Interests: Preventative medicine, acute illness, chronic condition management, hypertension, diabetes, anxiety, and depression
Megan Wren, MD
Medical Degree: Washington University School of Medicine, St. Louis, MO
Residency: The Jewish Hospital of St. Louis at Washington University
Clinical Interests: Preventive medicine, chronic disease management