Meet our team of Physicians and Physician Assistants:


Dr. Bruce Greenfield, MD

bruce-greenfieldDr. Bruce Greenfield was born in Winnipeg, Canada, and moved to Los Angeles as a child. He attended UCSD as an undergraduate and Albert Einstein College of Medicine for medical school. Before beginning his internship in internal medicine, he was the recipient of the International Health Fellowship, which provided him with the opportunity to practice medicine in the rural village of Black River, Jamaica. He completed both his residency in Internal Medicine and his fellowship in Nephrology at Baylor College of Medicine in Houston, Texas. He has been in private practice since 1986 and has also held various professional and academic positions such as Chief of Staff at California Hospital Medical Center and Clinical Instructor for the David Geffen School of Medicine at UCLA. Dr. Greenfield is the Founding Partner of Premier Nephrology Medical Group.

Dr. Kim Chi Le, MD

kim-chi-leDr. Kim Chi Le is board certified in Internal Medicine and Nephrology and has been in private practice with Premier Nephrology since 1999. She graduated with a B.A Cum Laude in Biology from California State University, Long Beach and then attended Tufts University, School of Medicine. After finishing medical school, she returned to Los Angeles where she completed her Internship, Residency in Internal Medicine, and Fellowship in Nephrology at USC Medical Center. Dr. Le is a Partner at Premier Nephrology Medical Group.

Dr. Leon Rovner, MD

leon-rovnerDr. Leon Rovner is Board Certified in Internal Medicine and Nephrology. He completed internship and residency in internal medicine at The Jewish Hospital of Cincinnati, Affiliated with University of Cincinnati where he served as Chief Resident and earned various awards including the Deepak Bhandari award for clinical experience, professionalism and academic achievement.

Dr. Rovner trained in Nephrology and Hypertension at Mount Sinai in New York and specializes in a full spectrum of kidney diseases in office, acute and long term settings. He manages patients with chronic kidney disease, refractory hypertension, diabetic kidney disease, kidney stone disease, kidney disease in elderly, kidney and pancreas transplant, cystic kidney disease and end stage renal disease patients including hemodialysis and peritoneal dialysis.

Dr. Luani Lee, MD

luani-leeDr. Luani Lee completed her Internship and Residency in Internal Medicine at Harbor UCLA medical center. She then stayed at Harbor UCLA for her Fellowship training in Nephrology and Hypertension. Dr. Lee treats patients in a variety of settings, including in hospital care, outpatient clinic care and she also manages patients whom require long term outpatient hemodialysis and peritoneal dialysis care.

Wanda Ichiriu, PA-C

Wanda-IchiriuWanda Ichiriu, PA-C is a board-certified physician assistant with Premier Nephrology Medical Group since 2001.

Ms. Ichiriu earned her Bachelor of Science degree in Physical Therapy from the California State University of Long Beach. After working for several years as a Physical Therapist in various subspecialties, she changed her career path to Physician Assistant, whereby earning her post- graduate certificate Physician Associate degree from Yale University School of Medicine in 1996. Ms. Ichiriu received the Yale Physician Associate Writing Award for her graduate paper, “The Use of Radiofrequency Ablation for Cardiac Arrhythmias.”

Upon graduation from Yale University, Ms. Ichiriu has worked in various subspecialties as a physician assistant, to include internal medicine, urgent care, emergency departments (various hospitals), and presently is employed in nephrology, whereby she helps to manage the care of out patient dialysis patients in several out patient dialysis clinics in the Los Angeles and greater Los Angeles areas.

Benjamin Chow, PA-C

Benjamin-ChowBenjamin Chow has been with Premier Nephrology Medical Group for over two years. He completed his Physician Assistant Studies at Charles R. Drew University of Medicine and Sciences in 2008. As part of his PA studies, he obtained various clinical experiences and medical training in and around the surrounding area of South Central Los Angeles. He has a solid history of Family practice/Internal medicine obtained by working in a non-profit federally qualified health center (FQHC). Benjamin takes his work very seriously and serves his patients with distinctive pride, unparallel compassion and unspeakable dedication.

Jonathan Casillas, PA-C

jonathanJonathan Casillas completed his Physician Assistant studies at Charles R. Drew University of Medicine, here in Los Angeles. He has years of experience of caring for patients on dialysis. Before joining Premier Nephrology , he worked for two local nephrology practices where he treated patients in dialysis centers and hospitals.