Leah Grossman, MD
Internist
558 N Ventu Park Rd Ste A
Thousand Oaks, CA 91320
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Availability last updated 10/10/2026
Leah Grossman, MD
Internist
558 N Ventu Park Rd Ste A
Thousand Oaks, CA 91320
Dr. De Silva is board certified in Internal Medicine and Bariatric Medicine and extensively trained and certified in Aesthetic Medicine and Federal Aviation Medicine. She attended Colombo Medical School in Sri Lanka, her country of origin, earning a degree in Medicine and Surgery with Honors. She did her residency training in both Internal Medicine and General Surgery at Columbia University College of Physicians and Surgeons in New York City. Following her residency, she worked in the Emergency Department at Valley Hospital in Ridgewood, New Jersey. In 1995, Dr. De Silva established De Silva Medical Inc., her current private practice for Internal Medicine in the Antelope Valley. She has professional training in the various fields of Aesthetic Medicine taught personally and certified by Dr. Zein Obagi, including The Concepts of Skin Health Care, Arque Derma, and The Artistic Restoration Lift. Dr. De Silva also has extensive training in Medical Weight Loss. Read more here.
Dr. Pamela De Silva, MD
Internist
623 West Ave Q
Suite A
Palmdale, CA 93551
At her friendly and welcoming office, Dr. Hedyeh M. Golshan has treated many Rialto and San Bernardino county, California residents. A board-certified internist, Dr. Golshan is highly trained in her field and provides a number of different services for patients.
Dr. Golshan studied medicine at the University of Leeds in England, where she earned both a Bachelor of medicine degree and a Bachelor of surgery degree. After finishing medical school, she attended Wayne State University in Michigan to complete her residency in internal medicine. Today, Dr. Golshan is proud to be board-certified by the American Board of Internal Medicine and a member of the American College of Physicians.
In addition to specializing in internal medicine which manages chronic illnesses, geriatric care and women’s health services she also provides the following:
Many of the patients who have come to Dr. Golshan’s office highly recommend her to others in the area.
Dr. Hedyeh Golshan, MD
Internist
1850 North Riverside Avenue
Suite 230
Rialto, CA 92376
Dr. Javadi was born in Iran and grew up in Houston, Texas. She received her undergraduate degree in Biology from The University of Texas at Austin and went on to obtain her Master's from Texas State University. She received her medical degree from St. George's University School of Medicine and completed her Internship and Residency in Internal Medicine at Albany Medical Center in New York.
She moved back to Houston to complete her Fellowship in Hepatology at The University of Texas Medical School in Houston, where she stayed on as an Attending Physician.
After moving to Los Angeles in 2006, Dr. Javadi worked as Assistant Professor of Clinical Medicine at Keck School of Medicine of the University of Southern California (USC). She subsequently accepted an Assistant Professorship at Southern Illinois University School of Medicine to care for patients with Liver disease, and continued to train Residents and Fellows.
Dr. Javadi eventually moved back to the Los Angeles area and joined ProDigest Gastroenterology & Hepatology Associates, to continue caring for patients with liver disease. She is Board Certified in Internal Medicine and is a member of American Association for the Study of Liver Diseases.
Dr. Javadi is dedicated to helping patients with liver disorders, including fatty liver, viral Hepatitis, and management of liver cirrhosis/end-stage liver disease that may require liver transplant evaluation. Her detailed and humanistic approach to providing care for patients with liver disorders is built on years of experience at various academic centers.
Dr. Javadi looks forward to serving the people of Southern California.
Dr. Fariba Javadi, MD
Hepatologist
5750 Downey Ave
Suite 202
Lakewood, CA 90712
Laura Ryan, MD
Internist
11480 Brookshire Avenue
200
Downey, CA 90241
Alan Frischer, MD
Internist
11480 Brookshire Avenue
200
Downey, CA 90241
William Sim, MD
Internist
11480 Brookshire Avenue
200
Downey, CA 90241
Joao Ferraz, MD, is a fellowship-trained Critical Care Medicine specialist at Long Beach Medical Center. He completed his fellowship in Critical Care Medicine at Baylor College of Medicine in Houston, Texas, where he received extensive training in the management of critically ill patients, including advanced mechanical ventilation, hemodynamic support, and cardiovascular critical care.
Prior to fellowship, Dr. Ferraz practiced as a hospitalist at Cleveland Clinic in Cleveland, Ohio. He completed his Internal Medicine residency in Chicago and earned his medical degree from the University of São Paulo in Brazil.
Dr. Ferraz has particular interests in mechanical ventilation, respiratory failure, hemodynamics, cardiovascular critical care, and the care of patients with complex multisystem illnesses. His training also includes extensive experience with advanced mechanical circulatory support, including ECMO, ventricular assist devices, and other temporary mechanical support systems.
In addition to his clinical work, Dr. Ferraz is involved in medical education, clinical research, and quality improvement. He has published several peer-reviewed studies focused on the management of critically ill patients with respiratory failure and continues to pursue research aimed at improving evidence-based care and outcomes in the intensive care unit.
Originally from Brazil, Dr. Ferraz is fluent in English, Portuguese, Spanish, and French. Outside of medicine, he enjoys tennis, skiing, traveling, and spending time with his family.
Joao Ferraz, MD
Internist
3605 Long Beach Boulevard
Suite 405
Long Beach, CA 90807
Dr. Maged Tanios serves as the Regional Medical Director of Sound Physicians and is the current director of the ICU and Intensivists Program at Long Beach Medical Center. Dr. Tanios is a Board-Certified physician who specializes in pulmonary medicine, critical care, and sleep medicine. At Southern California Pulmonologists and Intensivists Network of Sound Physicians, the doctor and his staff serve the residents of Long Beach, California, and many neighboring communities. Dr. Tanios has been practicing medicine in Southern California for almost 15 years. He is a pillar in the local medical community and serves on many hospital boards and committees in the Long Beach area.
After completing his internal medicine residency, Dr. Tanios went on to complete several fellowships including three at Tufts-New England Medical Center in sleep medicine, critical care medicine, and pulmonary medicine. In addition to earning his medical degree, Dr. Tanios earned a Master of Public Health (MPH) in Health Services Management & Policy from Tufts University School of Medicine and is completing an MBA in Healthcare Management at Johns Hopkins Carey Business School.
Dr. Tanios is also an accomplished associate professor of medicine at David Geffen School of Medicine at UCLA. Dr. Tanios received the Golden Apple Award for Teaching excellence from the Family Medicine program at Long Beach Medical Center and the Munzer Family Award for Research and Literary accomplishment from the Memorial Medical Center Foundation.
Dr. Tanios has received numerous achievements and awards for his work. He has been recognized by the American Lung Association and has also applied for and received grants from the National Institutes of Health. Most recently, Dr. Tanios was selected to the 2016 registry of “America’s Best Physicians.” He has also been listed on Southern California Super Doctors for the consecutive years of 2016-2021.
Dr. Tanios is a member of the American Thoracic Society, the American College of Chest Physicians, and the Society of Critical Care Medicine.
Dr. Maged Tanios, MD
Internist
3605 Long Beach Boulevard
Suite 405
Long Beach, CA 90807
Reza Ghanian, MD
Internist
456 E Carson St
Carson, CA 90745
Hasan Mirza
Internist
1050 Linden Ave
Long Beach, CA 90813
Jinhua Shen, MD
Internist
1050 Linden Ave
Long Beach, CA 90813