Our Physicians

Audrey Chen
MD, FRCPC (Physiatry), FRCPC (Pain Medicine)

Dr. Chen is a Physical Medicine & Rehabilitation and Pain Medicine specialist in the Vancouver and Kelowna areas. She completed her medical degree at the University of Calgary, residency training in Physical Medicine & Rehabilitation at Dalhousie University in Halifax, and residency training in Pain medicine at the University of British Columbia. As well, she completed a Master of Science degree in Physical Therapy at the University of Toronto and undergraduate training in Kinesiology at the University of Alberta.

Aniz Khalfan
MD, FRCPC (Anesthesiology)
Bio coming soon!

Bio coming soon!

Michael Orenstein
MDCM, CCFP (SEM), Dip. Sport Med (CASEM)
Sport and Exercise Medicine Physician
ICBC Registered Care Advisor (RCA)

Dr. Orenstein is a fellowship trained Sport and Exercise Medicine physician. He completed his undergraduate degree at McGill University, majoring in Anatomy and Cell Biology while minoring in Kinesiology. He then completed both his medical school and Family Medicine residency training at McGill University. Following his residency, Dr. Orenstein moved to Vancouver to pursue a Sport and Exercise Medicine Fellowship through the University of British Columbia, which he successfully completed in June 2019. He is certified through the Canadian Academy of Sport and Exercise Medicine. He is faculty at the University of British Columbia as Clinical Instructor in the Department of Family Practice. He has helped provide coverage for a variety of major sporting events including Ironman Whistler, IIHF World Junior Hockey Championships, Ultimate Frisbee National Championship, GranFondo Whistler, ISU Grand Prix of Figure Skating, and UBC Football.

Dr. Orenstein’s clinical practice includes management of a variety of conditions, including acute and chronic sport injuries, and osteoarthritis. He is an advocate of physical activity promotion, priding himself on helping his patients improve their ability to function, regardless of their baseline. In addition to exercise therapy, He has a particular interest in ultrasound guided peripheral musculoskeletal injections to help manage osteoarthritis, frozen shoulder and chronic overuse injuries, amongst others conditions. Possible injection options, depending on the underlying condition, include platelet-rich plasma, viscosupplementation, and corticosteroid.

Dr. Orenstein’s interest in sports extends well beyond his work. He previously played basketball at Dawson College, then was on the McGill University Rowing Team while in university. He coached high school basketball for 5 years in Montreal.


  • Sport Injuries (Acute and Chronic)
  • Osteoarthritis
  • Ultrasound Guided Peripheral Musculoskeletal Injections
  • Platelet-rich Plasma

Will see WCB and ICBC cases on an expedited basis (please indicate referral is for RCA)

Mahesh Palanisamy
MD, FRCPC (Anesthesiology), Fellowship in Pain Management

Dr. Mahesh Palanisamy is an internationally trained specialist in Anesthesia and Pain Medicine. He has been extensively trained in the fields of Anesthesia and Pain Medicine in various healthcare systems; mainly in Republic of Ireland and Canada.

Dr. Palanisamy works as a Pain Specialist and Anesthetist at Jim Pattison Pain Centre at Surrey Memorial Hospital, and BC Women’s Hospital.

He has a special interest in Interventional Pain Medicine including management of neck, upper back, lower back, tailbone, shoulder, hip, and ankle pain. He is also interested in treating Complex Regional Pain Syndrome (CRPS), Fibromyalgia and Central Neuropathic Pain.

He has over 12 years of experience in Anesthesia and he has been helping patients with chronic pain for the last 7 years. During this period, he has learnt a variety of approaches in treating patients. He applies the best available knowledge and incorporates evidence-based medicine in the field of Pain Medicine.