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2011 Selection by Bay Area Physicians ( as Top Physicians in Pain Management Specialty

Justin Lo, MD
Dr. Lo is a graduate of University of California, Los Angeles. After completing his Bachelors in Biochemistry (1995), he attended University of Rochester School of Medicine, New York receiving a Doctorate in Medicine in 2000. As an Anesthesiology Resident at University of California, Irvine, Dr. Lo was consistently awarded top academic awards. He is Board Certified in both Anesthesiology and Pain Management, and has completed fellowship training in Pain Management at University of California, San Francisco.

During his recent tenure as an Assistant Clinical Professor of Anesthesiology at University of California, San Francisco, Dr. Lo was rated #1 in every category of the patient satisfaction ratings published by UCSF. Dr. Lo is committed to ongoing education and believes that patient education is the key component in Pain Management.
Ray Hsieh, MD
Dr. Hsieh received his undergraduate education at Northwestern University, Evanston, Illinois where he graduated with a degree in Biology. He attended medical school at Northwestern University as well, completing his medical degree in 1998. As Chief Resident during his anesthesiology residency at UC Irvine, Dr. Hsieh received the Konchigari Award for Resident of the Year, as well as the anesthesiology departments research award. Through ongoing participation in multiple research studies related to pain stimulation in various brain regions, Dr Hsieh discovered an interest in Pain Management, which led to fellowship training at University of California, San Francisco. Dr Hsieh’s commitment to research keeps Pain Care of Silicon Valley well-versed in all the latest advances in Pain Management. He also speaks conversational Taiwanese.
Al Cheung, MD
Dr. Cheung graduated from the University of Wisconsin, Madison, with a Bachelor's Degree in Pharmacy in 1974, and earned a Masters in Pharmacology from Stanford in 1978. A practicing pharmacist in Illinois and California, he entered Stanford to do research in Opiate receptors and Endorphins. After completing his MD at the University of Wisconsin in 1981, Dr Cheung joined the Anesthesiology Department at University of California, San Francisco to complete residency in this specialty. Double board certified in both anesthesiology and pain management, he has also completed a sub-specialty certification in pain management from the American Board of Anesthesiology. A practicing pain management physician since 1990, he was appointed Medical Director of the O'Connor Pain Management Clinic in 1995. Dr. Cheung brings tremendous experience and compassion to our practice. In addition, he speaks Cantonese.
Julie T. Chen, MD
Dr. Chen graduated Summa Cum Laude, Provost Scholar, and Alpha Omega Alpha from the Rochester Early Medical Scholars combined B.A.-M.D. degree program at University of Rochester School of Medicine and Dentistry in Rochester, New York with a Bachelors in Public Health and a Doctorate in Medicine with Distinction in Research.

Dr. Chen has received multiple awards in her training from Foundations such as the American Medical Women's Association and American Academy of Dermatology. As an Internal Medicine Resident at California Pacific Medical Center in San Francisco, California, Dr. Chen was asked to be a Chief Resident and continued to receive accolades in her clinical research by the American College of Physicians.

She is board certified in Internal Medicine by the American Board of Internal Medicine and has received formal training in Integrative Medicine by the University of Arizona, Arizona Center for Integrative Medicine in Tucson, Arizona. Dr. Chen has also trained with Helms Medical Institute for Medical Acupuncture for Physicians. Her additional formal training includes clinical hypnotherapy, strain-counterstrain osteopathic manipulations, and heart-rate variability biofeedback.

Dr. Chen is committed to promoting integrative and preventative health care.  She believes that early intervention before disease occurs is of the utmost importance in health care and that elimination of disease-promoting factors in a person's life is essential for disease prevention and chronic disease management.  She believes in optimizing total mind-body health in order to decrease medication dependence and prevent escalation of medication dosages.

Dr. Chen is bilingual with fluency in conversational Mandarin and English.

More information about Dr. Chen is available at:


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