Kayvan Haddadan, MD

Dr. Kayvan Haddadan is the President and Medical Director of Advanced Pain Diagnostic & Solutions, located in California. Dr. Haddadan founded the practice in 2012 and has served as its pain management physician for the past eleven years. He works to ensure that each member of the group’s multi-disciplinary clinical team is focused on diagnosing and confirming the source of each patient’s pain, and then carefully developing and documenting the most effective treatment plans.

Dr. Kayvan Haddadan earned his Bachelor of Science degree from the College of Alborz in Tehran, Iran, and his Medical Doctor degree at Shahid Beheshti University of Medical Sciences. Afterward, he went on to receive his Educational Commission for Foreign Medical Graduates (ECFMG) Certificate in Philadelphia before undergoing an internship in Medical Surgery at Loyola University Medical Center’s Stritch School of Medicine in Illinois. Once he’d completed his internship Kayvan decided to fulfill his residency at Stritch School of Medicine in Physical Medicine & Rehabilitation.

Following his time in Illinois, Kayvan went on to complete his Fellowship in Pain Medicine at California Pacific Medical Center’s Pacific Pain Treatment Center while also training in Medical Acupuncture for Physicians from the University of California, Los Angeles, David Geffen School of Medicine. To say that Dr. Kayvan Haddadan is driven and hard-working would be an understatement. Throughout his career as a healthcare professional and a researcher, Dr. Haddadan has been published in 29 different research papers and projects. His research includes studies in gastroenterology, pulmonology, infectious disease, pain management, endocrinology, and cardiology.

Besides being a licensed Physician and Surgeon with the Medical Board of California, Kayvan is also certified in Controlled Substance Registration through the DEA, a Qualified Medical Examiner through California’s Department of Industrial Relations Division of Workers Compensation and double board-certified in Pain Medicine and Physical Medicine & Rehabilitation through the American Board of Medicine and the Board of Physical Medicine and Rehabilitation, respectively.

Advanced Pain Diagnostic & Solutions

Christopher Brophy, MD

Dr. Christopher Brophy is a board-certified pain medicine specialist known for his compassionate care and easygoing bedside manner. He earned his Doctor of Medicine degree from the Keck School of Medicine of USC and completed his internal medicine internship at Adventist Health White Memorial. Dr. Brophy then pursued a residency in physical medicine and rehabilitation at UCLA Medical Center, followed by a pain medicine fellowship at UC Davis. Alongside his medical career, he enjoys powerlifting, cycling, and analyzing films. Dr. Brophy has joined Advanced Pain Diagnostic & Solutions, where he focuses on helping patients find relief from chronic pain through personalized, comprehensive care.

Advanced Pain Diagnostic & Solutions

Jay Hendrickson, MD

Dr. Jay A. Hendrickson, M.D. is a distinguished medical professional with a profound background in anesthesiology and pain management. Dr. Hendrickson is a Diplomate of the American Board of Anesthesiology and holds specialized expertise as a Fellowship Trained Pain Management Specialist, further recognized by his Diplomate status with the American Board of Pain Medicine.

Dr. Hendrickson earned his medical degree from The Medical College of Pennsylvania in Philadelphia, following previous studies at St. George’s University School of Medicine and the University of California Davis where he majored in Biochemistry.

Dr. Hendrickson's residency and post-doctoral fellowship experiences have shaped his expertise. He completed his residency in Anesthesiology at Thomas Jefferson University Hospital in Philadelphia, Pennsylvania, and a residency in General Surgery at Lankenau Hospital in the same city.

Throughout his career, Dr. Hendrickson has held significant clinical appointments, contributing to the field of pain management. He has been in private practice since 1998, founding Hendrickson & Hunt in Folsom and Roseville, California. Additionally, he served as an Assistant Professor in Pain Management at the University of California Davis School of Medicine, from 1998 to 2002.

Actively engaged in the medical community, Dr. Hendrickson has been affiliated with various professional organizations. He has been a Board Member at Large for the California Society of Interventional Pain Physicians since 2010 and a member of the International Spinal Injection Society since 2001.

In addition to his illustrious career, Dr. Hendrickson has recently joined Advanced Pain Diagnostic & Solutions, further expanding his impact and expertise in the field of pain management. As an outstanding medical professional, Dr. Jay A. Hendrickson brings a wealth of knowledge, experience, and a commitment to APDSS.

TJ Maroon
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TJ Maroon, MD

He received his medical training at UC Davis School of Medicine and continued his residency and post graduate training at the UCD Medical Center in Sacramento, California. He is board certified in Anesthesiology (1999) and Bariatric Medicine (2012) and treats youth, adolescent, and adult patients.

Dr. Maroon has been providing specialized medical services, including pain management and bariatric medical services, in Sutter, Yuba, Sacramento and Placer counties since 2010. Prior to that, he worked as an instructor in Heald College, Roseville, teaching medical assisting students medical terminology, anatomy, physiology, and medical laboratory skills.

Jianxun Zhou, MD, PhD

Board Certified in Physical Medicine & Rehabilitation and Electrodiagnostic Medicine, Dr. Zhou received his medical degree from Peking University Health Service Center in Beijing, China prior to earning his PhD in Philosophy from the University of Pittsburgh, School of Health and Rehabilitation Science. He then went on to continue his residency in Internal Medicine and Physical Medicine and Rehabilitation at Albany Medical Center in New York. After residency, Dr. Zhou decided to fulfill his fellowship in Interventional Spine and Electrodiagnostic Medicine at University of Massachusetts Medical Center Memorial Hospital.

 Dr. Zhou is a knowledgeable, an unbiased, and an empathetic medical professional that brings with himself many years of experience in the healthcare atmosphere. He takes the necessary time to establish respect and trust with each patient in order to get to the bottom of their health problems.