MEET THE DOCTOrs

CHRISTOPHER CHUN, M.D.
Double Board Certified in
Anesthesiology and Interventional Pain Management
Dr. Christopher Chun has had extensive training and experience in the past. He completed an Anesthesiology residency and ACGME accredited fellowship in Pain Management at Loma Linda University Medical Center in Loma Linda, CA. He is double-board certified in Anesthesiology with sub-specialty certification in Pain Medicine by the American Board of Anesthesiology.
His specific areas of interest are in Interventional Pain Management (injections, procedures) and advancement in the field of Pain Management. He treats his patients using a multi-disciplinary approach to provide patient-specific compassionate care. Dr. Chun’s goals for his patients are to correctly diagnose, for them to understand the source and reason for their pain, know the different treatment options to help treat that source of pain, help them to function and work better, and obtain a better and improved quality of life.
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DENNIS GUMBRECHT, MD
Double Board Certified in
Anesthesiology and Interventional Pain Management
Growing up in the Midwest, Dr. Gumbrecht started his professional career as a mechanical engineer, specializing in the automotive industry and occupant safety. This opened many opportunities which included working with orthopedic surgeons and scientists in the hospital setting. He eventually centered his focus as a Doctor of Medicine and completed his residency in Anesthesiology at Loyola University Medical Center Chicago. Following residency, he completed his fellowship in Pain Medicine at Rush University Medical Center. He is double board certified by the American Board of Anesthesiology (ABA) in Anesthesiology and in Pain Medicine.
Dr. Gumbrecht's approach to pain medicine includes a multifaceted method of counseling and educating patients of their diagnoses. He takes a tailored approach to their care and provides treatment options that may include therapy, medications, and interventional procedures. This pathway has helped patients to manage their pain symptoms and rehabilitate into their functional lifestyle.
His specialty focuses include Neuromodulation and Regenerative Medicine.
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ROBERT CHEN, MD
Double Board Certified in
Anesthesiology and Pain Medicine
Dr. Chen grew up in the Midwest and attended Washington University in Saint Louis and studied chemistry to learn about the complexities of chemicals and medications. He studied the effects of sepsis on energy molecules in animal models with doctors from the school of medicine and department of chemistry. He pursued a degree in medicine at the Penn State College of Medicine and attended residency at John's Hopkins Hospital in anesthesiology and critical care. Following residency, he completed a fellowship in Pain Medicine at the University of Pennsylvania. He is double board certified by the American Board of Anesthesiology (ABA) in Anesthesiology and in Pain Medicine.
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Dr. Chen has had over 24 years of experience and takes a multifaceted approach to identifying the root cause of a patients medical problems and attempts to provide a realistic solutions given the limitations or resources available. He realizes that there are many challenges to medicine today and strives to be a patient advocate with the goals improving their activities of daily living as well as their quality of life.

DAVID RUBIN, MD
Board-certified Neurological Surgeon by the American Board of Neurological Surgery
Dr. Rubin specializes in disorders of the spine and treating patients suffering from pain or other symptoms affecting the low back, neck, arms and legs. While Dr. Rubin utilizes the most up-to-date diagnostic and surgical techniques he still believes the most important part of medicine is communication with his patients. His goal is to help you understand the cause of your pain and all the available treatment options to formulate a treatment plan that is right for you.
His career in neurosurgery started early. As an undergraduate student at the University of Virginia, Dr. Rubin worked with the Department of Neurosurgery researching treatments for victims of head trauma and shadowing busy neurosurgeons in the OR and clinic. After graduating from the University of Virginia with distinction, Dr. Rubin attended medical school at the University of Southern California Keck School of Medicine. As a senior medical student he served as a mentor and tutor in anatomy, pharmacology, pathology and other subjects. He was awarded a USC Salerni Collegium academic scholarship and elected to the national medical honor society, Alpha Omega Alpha (AOA).
Dr. Rubin completed his neurosurgical training at the prestigious Weill Cornell New York Presbyterian and Memorial Sloan Kettering Cancer Center in New York. Weill Cornell Neurosurgery is consistently ranked among the very best in the nation in US News and World Report annual rankings. Throughout his career Dr. Rubin has been involved in neurosurgery research and has published a number of papers in peer-reviewed medical journals

PAUL D. SAADI, MD
Orthopedic and Spine Surgeon
Fellow of the American Academy of Orthopedic Surgeons
Dr. Saadi has 20 years of experience in orthopedics since 1999. While in practice, he has focused much of his on the utilization of state of the art technology to develop techniques using computer assistance and robotics to more accurately align and position joint replacement implants through minimally invasive exposures. This includes total and partial knee resurfacing, total hip replacement, and total and reverse shoulder replacement. He has been part of a design team for seven years culminating in the development and recent FDA approval of the first 3D planning and live comprehensive total shoulder computer navigation system in the world.
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In addition, his practice offers implantation of completely customized patient- specific knee replacements made using additive manufacturing technology - commonly known as 3D printing". He also uses computer assisted surgery technology for increased accuracy, efficiency, and safety in spinal operations to help minimize surgical exposure to trauma and improve recovery. He takes pride in helping patient choose among all of these technologically advanced options for knee, hip, shoulder, and spine problems to assists them in best addressing their condition. Dr. Saadi is a Fellow of the American Academy of Orthopaedic Surgeons.
