Physician Team


Mark Berman, MD, FACS

Mark Berman, MD, is an internationally renowned expert in the field of regenerative medicine and cellular therapy and helped to restore the health of thousands of patients around the globe – without dangerous prescription drugs or risky surgery.  Together with partner Elliot Lander MD, he co-founded the CSN, a global network of 500+ doctors worldwide dedicated to the research and advancement of cellular therapy. For over a decade, Dr. Berman has tracked and followed his patient’s stem cell treatment outcomes, using IRB approved cellular therapy protocols, in an independent, 3rd party, global medical database. His patients are routinely followed up with for a 5 year period to track safety and conditions specific outcomes, data which has been used to drive informed clinical decisions, but also has been used for over 10 peer-reviewed publications. Since 2010, Dr. Berman, along with his multi-disciplinary team of physicians, is proud to have helped restore the health of thousands of patients with a wide array of medical ailments and diseases, including various types of orthopedic conditions/injuries, auto-immune disorders, cardiac/pulmonary disease, neurological disorders, chronic pain, and much more. While he has cared for numerous high profile personalities, celebrities, and professional athletes, he has also donated his time to help those unprivileged and in need. Currently, he is  one of few physicians in the United States qualified to freeze and store his patient’s stem cells.

Dr. Berman is devoted to furthering the field of regenerative medicine and has published numerous scientific papers – including a first of its kind study that demonstrated the safety and efficacy of autologous stem cell therapy.  Through his advanced training and decades of continuing education, he is able to provide his patients with the latest advancements in stem cell therapy and the field of regenerative medicine.  Above all, he is committed to providing his patients with only the most safe, effective, and ethical cell-based therapies available, all revolving around their own personal cells. As founder and CEO of the California Stem Cell Treatment Center, Dr. Berman’s philosophy is to provide the highest quality, state of the art care while maintaining concern and compassion for each patient’s individual needs. This means treating the whole person, not just their injury or illness. 

In his spare time, Dr. Berman enjoys many different sporting activities, plays the guitar, and loves to read and write.  In fact, he’s authored numerous scientific papers in the field of regenerative medicine and co-author of the book, The Stem Cell Revolution, which highlights real stories from a number of their patients that were given their health back with stem cell treatment.

Curriculum Vitae


Elliot Lander M.D. F.A.C.S

Dr. Elliot Lander, a Board Certified Urologist, is Co-Founder and Co-Medical Director of California Stem Cell Treatment Center, Cell Surgical Network, and Cells On Ice, LLC. Elliot B. Lander, M.D. F.A.C.S. is a Board-Certified Surgeon. He was born in Los Angeles,California. He graduated Magna Cum Laude and Phi Beta Kappa from Occidental College with Distinction in Biochemistry. He attended medical school at the University of California, Irvine. For six years after medical school, Dr. Lander studied General Surgery and then Urologic Surgery at the University of California, Irvine. He was a Clinical Assistant Professor of Urology at UC Irvine while in practice in Orange County for five years. During that time he was active in teaching residents and doing research. Dr. Lander has been elected as a Fellow of the American College of Surgeons. He has served as Chief of Urology at Eisenhower Medical Center and Chief of Surgery at John F. Kennedy Hospital. Dr. Lander has been on staff at Eisenhower Medical Center for twenty years. He is also an Expert Reviewer in Urology for the California Medical Board. Dr. Lander is also doing clinical research on his patented liposome encapsulated pentosan for the treatment of interstitial cystitis and is founder of Nanologix Research Inc. Dr. Lander is a pioneer in regenerative urology with publications on using stem cells to treat Peyronies Disease and Erectile Dysfunction, and interstitial cystitis. Also, one area of very special interest includes the study of the use of stem cells in developing cancer vaccines.

Dr. Lander is currently involved in IRB approved translational stem cell treatment research at the California Stem Cell Treatment Center based in Rancho mirage and Beverly Hills. Dr. Lander co-founded Cells On Ice® which is a cryobanking stem cell technology company. He is a founding member of the International Cell Surgical Society ICSS, a nonprofit organization supporting cell therapy research and education. ICSS supports Regenatrak™ which is an online regenerative medicine database tool use by clinicians to track clinical outcomes and adverse events from all over the globe. Dr. Lander and his team of multispecialty experts were instrumental in bringing fat derived stem cell technology to the United States in 2010 and have pioneered several new techniques in regenerative medicine. Dr. Lander is co-founder of Cell Surgical Network, an international research network dedicated to studying the clinical applications of adipose-derived stem cells. Research affiliate physicians trained by the Cell Surgical Network team can be found all around the world. Dr. Lander is co-author of The Stem Cell Revolution, a popular book on regenerative medicine.

Thomas J. Grogan, MD

Dr. Grogan is a practicing pediatric orthopedic surgeon at Pacific Coast Sports Medicine in Los Angeles. Dr. Grogan graduated cum laude from Princeton University with a degree in Biology and received his medical degree from the University of Cincinnati College of Medicine. Dr. Grogan’s orthopedic training has included an orthopedic residency at UCLA plus several orthopedic fellowships in pediatric orthopedics, trauma, and NIH sponsored joint replacement surgery. Following his orthopedic training he returned to Los Angeles, spending six years at Shriner’s Hospital for Crippled Children, including serving as Assistant Chief in 1996 and 1997. In addition to his clinical practice, he spent several years involved in managed care consulting as an orthopedic surgeon and has developed special expertise in this area. He has collaborated with the American Academy of Orthopedic Surgeons in the development of a handbook and audiotape entitled, “Health Care Reform and Managed Care: A Guidebook for Orthopedic Surgeons”. In addition, he has served as the lead faculty member for the AAOS for their 1995, 12 city educational seminar, “Taking Charge: Managed Care Contracting for Orthopaedic Surgeons” and as a faculty member for the AAOS’s 1996 seminar series entitled, “Winning at Risk: The Interplay of Cost, Quality, and Access in Orthopaedic Practice”. He most recently served as a faculty member for the AAOS’s 2009, 2010, 2011 and 2012 seminars, “Practice Management Symposium for Practicing Orthopaedic Surgeons’. He is currently chairman of the Practice Management Committee for the American Academy of Orthopaedic Surgeons and a member of their Council on Education. He is a member of Alpha Omega Alpha, Honor Medical Society, the Sigma XI Scientific Research Society, California Orthopaedic Association (COA), the Pediatric Orthopaedic Society of North America (POSNA), the American Academy of Orthopaedic Surgeons (AAOS), and is a diplomate of the American Board of Orthopaedic Surgery.


Walter O’Brien, MD

Dr. Walter O’Brien is an orthopedic surgeon practicing in Los Angeles. His clinic, Pacific Coast Sports Medicine, is a multidisciplinary collaboration that uses synergistic treatments in the pursuit of regenerative orthopedics. In addition to stem cell therapy, the clinic combines techniques such as High Intensity Laser Therapy, OrthoPulse EPAT, Hako-Med ElecDT, VAX-D, acupuncture, nutrition counseling, lymphedema treatment, and physical therapy.

Dr. O’Brien completed his medical school and five year orthopedic surgery residency at the University of Kansas. During medical school he experienced surgery from the patient’s perspective undergoing anterior cruciate ligament reconstruction of his knee. He was fortunate to have been operated on and subsequently mentored by one of the true pioneers of modern day knee reconstructive surgery, Charles Henning, MD. Dr. Henning also was an innovator in the prevention of knee injuries. Pediatric orthopedics is one subspecialty interest of Dr. O’Brien, especially pediatric trauma and fractures. He completed six months of residency at The Childrens’ Hospital in Denver, Colorado under the directorship of Robert Eilert, MD where he studied a potentially serious type of children’s elbow fracture and developed methods for surgeons to minimize permanent deformity.

With a subspecialty interest in sports medicine, Dr. O’Brien embarked upon a unique two year traveling fellowship involving many of the innovative gurus at several meccas of sports medicine. He studied with Ejnar Eriksson, MD at the renowned Karolinska Hospital in Stockholm, Sweden learning his pioneering techniques in arthroscopy of the knee, shoulder, elbow, ankle, and hip. Dr. Eriksson also was a world leader in the rehabilitation of musculoskeletal injuries. Dr. O’Brien traveled to Switzerland and participated in the prestigious A.O. Fellowship program learning state-of-the-art techniques in fracture surgery and worked with Werner Muller, MD, a leading authority on knee ligament surgery. The educational journey also included time in Paris, France studying under the wing of Jean-Yves Dupont, MD as he pioneered work in ligament reconstruction, meniscal repair, and accelerated rehabilitation after knee surgery. The renowned Orthopaedic and Arthritic Hospital in Toronto, Canada hosted Dr. O’Brien as he learned from Robert Jackson, MD who introduced arthroscopic surgery to North America after observing its birth during a trip to Japan. The highly regarded Hospital for Special Surgery in New York City provided a training grounds as Dr. O’Brien learned from Russell Warren, MD, team doctor for the New York Giants NFL team and known for his cutting-edge work in shoulder surgery and knee reconstruction. Dr. O’Brien also was fortunate enough to work with another pioneer in knee reconstructive surgery and rehabilitation, Frank Noyes, MD of Cincinnati, Ohio. After completing this remarkable educational experience, Dr. O’Brien moved to southern California and spent his first year in private practice working with Martin Blazina, MD, another pioneer of knee surgery originally from the Kerlan-Jobe Clinic and subsequent founder of the sports medicine department at UCLA.

Dr. O’Brien has numerous peer-reviewed publications and has received many awards for his basic science research and clinical studies.  He has lectured repeatedly at multiple national and international orthopedic society conferences.  His clinical experience includes over 10,000 surgical procedures in his distinguished career.


Christopher Duma, MD, FACS

Board-certified neurosurgeon specialist Christopher Duma, M.D., FACS, serves as Medical Director of Brain and Spine Surgeons of OC and Medical Director of the Brain Tumor Program at Hoag Memorial Hospital Presbyterian in Newport Beach, Calif. He also serves as assistant clinical professor of neurosurgery at the University of California, Irvine’s School of Medicine as well as director of radiosurgery for UCI Medical Center’s Department of Neurosurgery residency training program. His affiliations include Mission Hospital in Laguna Beach, UCI Medical Center in Orange, and Orange Coast Memorial Medical Center in Fountain Valley.

Dr. Duma received his general neurosurgical training at Georgetown University Hospital in Washington, D.C., followed by a fellowship at the University of Pittsburgh Medical Center Presbyterian in Gamma Knife radiosurgery and stereotactic and functional neurosurgery. He has been involved in medical research since his undergraduate education, beginning at the Cornell University School of Medicine’s Department of Neuropharmacology and continuing on through his graduate years at Memorial Sloan-Kettering Cancer Center’s Department of Neurology Pain Service. In 2002, Dr. Duma founded The Foundation for Neurosciences, Stroke and Recovery to provide outreach and assistance to patients with movement disorders. He continues to serve as Chair of the Foundation for Neurosciences, Stroke and Recovery, and remains active in Orange County’s medical community.


John Feller, MD

Dr. Feller completed his undergraduate training in metallurgical engineering and materials science at the University of Notre Dame graduating cum laude (1978-1982). He then attended the Ohio State University School of Medicine graduating summa cum laude (1983-1987). Dr. Feller subsequently completed four years of postgraduate medical training at Stanford University School of Medicine, culminating in board certification in Diagnostic Radiology (1987-1991). Following fellowship training in orthopedic and body MRI (1992), Dr. Feller served in the US Air Force as Chief of MRI at David Grant USAF Medical Center; a position he maintained for four years (1992-1996). Dr. Feller is currently the Medical Director and Founding Partner of Desert Medical Imaging in California, and Chief of Radiology as well as a Partner in American Medical Center in China. He was the MRI Consulting Radiologist for Desert Orthopedic Center from 1998 to 2010. He maintained an academic affiliation with Stanford University where he was an Assistant Clinical Professor in the Department of Radiology (1991-2006), and is now an Assistant Clinical Professor in the Department of Radiology at Loma Linda University. Dr Feller was awarded the Volunteer Clinical Faculty Teacher of the Year in 1992-1993 from Stanford University Medical Center Department of Radiology. Dr. Feller has co-authored numerous peer- reviewed journal articles, book chapters, and is an editor of the textbook Shoulder Magnetic Resonance Imaging. He has given over 300 invited lectures worldwide on orthopedic, prostate and body MR imaging.


Jonathan S. Braslow MD

Jonathan S. Braslow M.D., is an orthopedic surgeon who was a part of the original CSN development team, and who continues to consult at the California Stem Cell Treatment Center in Rancho Mirage, California.  He also practiced at John F. Kennedy Memorial Hospital for over a decade, where he was the medical director of the hospital’s Arthritis Institute.  He specializes in arthritis treatment, particularly knee replacements, and has a breadth of experience in the development and design of joint replacements. Dr. Braslow’s extensive experience in joint replacement includes his designing and developing a number of products, including the Implex Hedrocel Unicompartmental Knee Replacement for Implex Corporation, the Genus Unicompartmental Knee Replacement for BioMet, and the Knee Ligament Surgery Instrumentation and Reconstruction Techniques for De Puy Corp. and Osteonics. He serves on the international development team for Zimmer Corporation, one of the largest manufacturers of orthopedic implants, working on the next generation of partial replacements incorporating trabecular type metal. Dr. Braslow has received license and certifications from the American Board of Orthopedic Surgery, the American Association of Orthopedic Surgeons. He is recognized as a Qualified Medical Examiner in Orthopedics and a Radiology Supervisor/Operator in Fluoroscopy by the State of California. Past appointments include Governing Board Member of John F. Kennedy Memorial Hospital (1996-99) and as the hospital’s Chief of Surgery (1994-96). He is also a member of a number of professional associations, including the California Medical Association, the California Orthopedic Association and the Medical Board of California, among others. Graduating with honors from the University of California, Riverside, where he received a B.A., he went on to earn his M.D. at the University of California, Irvine. He then completed his residency at the University of Southern California Medical Center in Los Angeles, where he received the award for Outstanding Senior Resident. A California native, Dr. Braslow was born on Catalina Island in the city of Avalon in May 1947.  He and his wife Janet currently reside in Indio, California with their two daughters, Jacqueline and Juliet.