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.

Maureen Lyons, MD

Medical Degree: University of Chicago Pritzker School of Medicine 
Residency: University of Chicago Medical Center
Clinical Interests: Preventive medicine, chronic disease management, depression, anxiety.

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

Elizabeth Walden-Prater, NP-C
Master’s Degree: Master of Science, Nursing, Saint Louis University