Margaret Johnson Bia, M.D., is now a retired professor emeritus of medicine but is still involved in patient care. She volunteers time as a preceptor for medical students in the clinics caring for underserved patients in the New Haven community. By the time of her retirement in 2018, she had spent forty years caring for patients with kidney disease, especially those receiving kidney transplants. She has always been involved in teaching medical students, residents, and renal fellows, and after stepping down as medical director of transplant in 2000, she created the Clinical Skills program at the School of Medicine and served as its director until 2014. She has authored over 110 original articles and book chapters.