UR Medicine / Neurosurgery / Services / Brain and Spinal Tumor Program / Our Team Our Team Director Kevin A. Walter, MD Neurosurgery Webster H. Pilcher, MD, PhD Tyler Schmidt, DO Howard Silberstein, MD G. Edward Vates, MD, PhD Melissa Simpson, NP Valerie Phillips, NP Megan Solimano, NP Susan O. Smith, ANP-C Neuro-oncology David Korones, MD Nimish Mohile, MD Sara Hardy, MD Lauryn Hemminger, MD Jacqueline M. Behr, RN, MS, FNP Jennifer N. Serventi, R-PAC, CCRP Radiation Oncology Michael T. Milano, MD, PhD Kenneth Y. Usuki, MD Endocrinology Laura Calvi, MD Oncology Social Worker Barbara K. Guttman, LMSW