Porter Ranch Team

Dr. Juan M. Alcantar grew up in Oxnard. He attended the David Geffen School of Medicine at UCLA and completed an internal medicine residency at Olive View-UCLA Medical Center. His medical oncology and hematology fellowship was completed at Harbor-UCLA and City of Hope Medical Centers. Prior to completing his fellowship, Dr. Alcantar practiced ambulatory and hospital medicine in Sherman Oaks, California. He was in private practice in hematology/oncology from 2011-2015. Dr. Alcantar is board- certified in internal medicine as well as hematology and oncology. He regularly participates in multi-disciplinary tumor boards to provide optimal and up-to-date treatments for his patients. He is dedicated to providing comprehensive medical care with quality and compassion to his patients. Dr. Alcantar enjoys his spare time with his wife and two sons. He also enjoys soccer and reading on the history of medicine.

Dr. Melissa J. Cohen is assistant clinical professor of medicine at the David Geffen School of Medicine at UCLA and a board certified medical oncologist practicing at UCLA Hematology/Oncology in Westlake Village and Porter Ranch. She began her medical training at George Washington University in Washington D.C., and then moved to Denver where she completed her internal medicine residency training at the University of Colorado. In 2008, she relocated to Southern California to complete her fellowship training in both geriatrics and medical oncology at UCLA.

Dr. David Kim is a Southern California native, who graduated summa cum laude from UCLA with a bachelor’s degree in Biology. He earned his medical degree at USC Keck School of Medicine and completed his internship and residency in Internal Medicine at UCLA Medical Center. Dr. Kim continued on to complete his Hematology/Oncology fellowship training at UCLA Medical Center. Dr. Kim is a board certified hematologist and medical oncologist who practiced his specialty for 6 years at the award-winning Leavey Cancer Center in Northridge prior to joining UCLA Health in Porter Ranch.

Dr. David Shin attended medical school at Northwestern University in Chicago. He completed internal medicine residency at University of Massachusetts and fellowship in hematology and medical oncology at the David Geffen School of Medicine at UCLA. He is board-certified in internal medicine, hematology and medical oncology. He treats benign and malignant conditions of hematology as well as various cancers. He endeavors to provide compassionate care.