Our Providers Durga Adhikari, M.D. Colin C. Edgerton, M.D. Nicholas Holdgate M.D. Jennifer K. Murphy M.D. Gregory W. Niemer M.D. Karen McKerihan, MSN, NP-C Bradley Collins, D.O. Kaitlyn Horner, MCMSc, PA-C Thyra Maltese, PA-C Haley Christian, PA-C, MPAS Allison Plaster, FNP-C Chikako Riester, NP Amanda Robertson, AGNP-C