100 UCLA Medical Plaza
Suite 760
Los Angeles, CA 90095
Ph: (310) 264-7246   
Fax: (310) 882-7005

Physician Profiles



Joshua P. Prager M.D., M.S.
Clinical Assistant Professor of Medicine
Clinical Assistant Professor of Anesthesiology
David Geffen School of Medicine at UCLA

Director, California Pain Medicine Centers
Center for Rehabilitation of Pain Syndromes (CRPS)
Los Angeles, California


Joshua P. Prager, MD, MS, is President of the North American Neuromodulation Society (NANS). He is the Director of the Center for Rehabilitation of Pain Syndromes (CRPS) at the University of California, Los Angeles, where he is a member of the Departments of Internal Medicine and Anesthesiology.

Dr. Prager completed his premedical education at Harvard University, in Cambridge, Massachusetts while a graduate student in Public Policy, Planning, and Administration. He proceeded to Stanford University, in Stanford, California, where he received his medical degree and also attended the Graduate School of Business, receiving a master's degree in Management/Health Services Research. He received his postgraduate medical training at UCLA (internal medicine internship and residency), Stanford (anesthesiology residency), and Massachusetts General Hospital (MGH) at the Harvard Medical School (resident and clinical fellow in anesthesia).He began his academic career on the faculty at MGH. He is board certified by the American Board of Pain Medicine, the American Board of Internal Medicine, and the American Board of Anesthesiology with a subspecialty certification in Pain Medicine.

Using a combination of his business and medical training, Dr. Prager managed approximately 500,000 patient lives at CIGNA Health Plans and founded their multimodality pain program. He then directed the UCLA Pain Medicine Center until he established the California Pain Medicine Centers. His clinical and research practice focuses on complex regional pain syndromes and neuromodulation. He has participated in numerous studies related to spinal cord stimulation, intrathecal medications (including ziconotide), patient programming and has conducted research related to several opioids, high dose capsaicin, and tumor necrosis factor for treatment of complex regional pain syndromes.

Dr. Prager feels that public service is an important component of his career. He helped establish or reorganize several inner city health centers, provided internal medicine care at the Haight Ashbury Free Clinic, and provided anesthesia for third world children with congenital anomalies undergoing corrective surgery. He has held numerous positions with medical organizations. Most recently, Dr. Prager organized the first meeting of a coalition of pain organizations and all three manufacturers of spinal cord stimulator systems to collaborate on issues of patient access and reimbursement for neuromodulatory procedures. One goal is to perform studies that will produce evidence-based data to demonstrate efficacy of these modalities.


Sanjog S. Pangarkar, M.D.
Pain Medicine, Physical Medicine and Rehabilitaion

Dr. Sanjog Pangarkar specializes in the treatment of acute and chronic pain syndromes, including: mechanical neck and low back pain, radiculopathy, complex regional pain syndrome, fibromyalgia and myofascial pain syndromes.

He completed his residency in Internal Medicine and Physical Medicine & Rehabilitation at Johns Hopkins Hospital and Sinai Hospital of Baltimore where he spent time working with some of the key innovators in the field of pain management. He is triple board certified in the fields of Internal Medicine, Physical Medicine & Rehabilitation, and the Subspecialty field of Pain Medicine. An Assistant Clinical Professor of Medicine at UCLA School of Medicine, Dr. Pangarkar offers presentations at affiliated teaching centers, other academic teaching programs as well as academic meetings. He also serves as the Director of the Pain Service at the West Los Angeles Veterans Hospital.

Dr. Pangarkar focuses his attention and practice on minimally invasive treatment options. He understands that pain can have an impact on every aspect of a patient's life, and consequently provides comprehensive treatment solutions. These center on a commitment to rehabilitate the body, using goal directed therapies, modalities, medications, and injections. This philosophy has lead to an improvement in patient satisfaction as well as outcome, with a clear reduction in morbidity.



Joann Ov-Saavedra RN, MSN, FNP-C
Licensed Nurse Practitioner

Joann Ov-Saavedra RN, MSN, FNP-C is a California licensed nurse practitioner with a Master of Science in Nursing from the University of San Diego. She is board-certified as a Family Nurse Practitioner through the American Academy of Nurse Practitioners (AANP). She received a Bachelor of Science degree in Molecular Cell and Developmental Biology from the University of California Los Angeles. Prior to CPMC, she worked as staff RN in the emergency department at Sharp Chula Vista Medical Center in San Diego. Mrs. Ov-Saavedra is an active member of the California Association of Nurse Practitioners (CANP) and the American Academy of Nurse Practitioners (AANP). She holds a philosophy of care that involves empowering patients to become active educated participants in their own healthcare management.


Marilyn S. Jacobs, Ph.D., ABPP
Licensed Clinical Psychologist

Marilyn S. Jacobs, Ph.D., ABPP is a clinical psychologist and psychoanalyst. Dr. Jacobs is in private practice in Los Angeles, CA with a specialization in the management of patients with chronic pain disorders. She is an Assistant Clinical Professor of Psychiatry and Clinical Instructor of Anesthesiology at the David Geffen School of Medicine at UCLA Medical Center. Dr. Jacobs was trained as a physician's assistant and worked for over a decade in clinical medicine prior to becoming a clinical psychologist. Dr. Jacobs has been a member of the Board of Directors of Division 39 of the American Psychological Association, the Academy of Psychoanalysis and of the Institute of Contemporary Psychoanalysis, Los Angeles.



Caroline Grierson, RN BSN, CBT
Licensed Registered Nurse

Caroline Grierson is a California licensed Registered Nurse. She graduated from the Vancouver General Hospital in 1964 and from the University of Western Ontario in 1966 with a Bachelor of Science in Nursing Administration. She was Head Nurse and Clinical Coordinator of the first Coronary Care Unit, at Good Samaritan Hospital in Los Angeles, from 1967 through 1971.

While raising her children, she was a part time lecturer at USC Post Graduate Division and Institute of Continuing Education for Nurses, Health Care Coordinator at the Bresler Center for Pain Management and Teaching Associate with the Academy for Guided Imagery.

Caroline has been in private practice doing Biofeedback and Neurofeedback in her own office, "Train Your Brain", since 1991 and a member of the Comprehensive Pain Management Program with Dr Prager since 2000. She is BCIA Certified (Biofeedback Certification Institute of America) and is a Senior Fellow in Biofeedback and a Fellow in Neurofeedback. As well, she is BCIA Certified in Stress Management and a Clinical Associate in the American Association of Pain Management.

Caroline recently published a study on the effects of Neurofeedback on RSD (CRPS) and has just released a teaching CD-Rom for Neurofeedback Practitioners called "Neurofeedback for Intractable Pain".