Our Team of Nephrology Physicians Our team of physicians comprises one of the largest nephrology practices in the eastern Ohio/ western Pennsylvania region. To learn more about our doctors’ medical training and professional credentials, click a name below. Nathaniel S. Doe, M.D., F.A.C.P. President Kathleen S. Padgitt, M.D., F.A.C.P. Vice-President Anup S. Bains, M.D. Vice-President Sherif A. Soliman, M.D., F.A.S.N. Christopher A. Enoch, D.O. Treasurer Andrea J. Shaer, M.D. Secretary Hasit P. Pandya, M.D., M.R.C.P. Patrick M. Martinucci, D.O. Michael C. Koprucki, M.D. Leonidas G. Vassilaros, M.D., F.A.C.P.