About Us
Pienkowski, M.D. Clinic
Founded in Knoxville in 1984, Pienkowski, M.D. Clinic has been caring for patients across East Tennessee for more than four decades. What began as a single allergy and immunology practice has grown to five locations in Knoxville, Greeneville, Johnson City, Kingsport, and Bristol. Through the years, our focus has remained the same: providing thoughtful, individualized care for patients with allergic, respiratory, and immunological conditions. Today, we continue that tradition by pairing decades of experience with modern, evidence-based allergy and immunology care.
Our Physicians
Marek Pienkowski MD, PhD - Physician and Founder
Dr. Marek Pienkowski is a physician, immunologist, and medical researcher who founded the Pienkowski family of clinics in 1984. He earned his medical degree and PhD in immunology from the Medical University of Warsaw and completed fellowship training in allergy and immunology at the Johns Hopkins School of Medicine. Throughout his career, he has combined scientific research with patient care, focusing on allergy, asthma, immunodeficiency, and desensitization and contributing to more than 50 scientific publications. Under his leadership, the practice expanded beyond its original Knoxville location to serve communities throughout East Tennessee. His dedication to advancing the field while making specialized care accessible to patients across the region established the foundation upon which the practice continues to grow.
Stefan Pienkowski MD, MA — Physician and Medical Director
Dr. Stefan Pienkowski is a board-certified family physician, ethicist, and medical researcher with advanced training in allergy, asthma, and immunology. He earned bachelor’s degrees in biology and philosophy from Emory University, a master’s degree in applied ethics from Duke University, and his medical degree from East Tennessee State University. His medical research focuses on asthma, urticaria, anaphylaxis, vaccine allergy, desensitization, and airborne allergens in East Tennessee. At Pienkowski MD Clinic, he continues his family’s longstanding commitment to allergy and immunology while bringing the broad perspective of family medicine to each patient’s care. As Medical Director, he draws on his background in applied ethics to guide the clinic’s day-to-day operations and broader approach to patient care, while working closely with its allergist-immunologists on specialty clinical protocols.
