Our Providers Humberto Balderrama, FNP-C Aleksandr A. Reznichenko MD, PHD, FACS Sidhartha Tulachan , M.D. Erica Campos, APRN, MSN, FNP-C Karina P. Mosier, MSN, FNP-C Mark J. Cossentino, MD Ruben Ramirez-Vega, MD