Meet The Team
Richard Rosenthal, M.D
Richard Rosenthal, M.D. is a world-renowned pain medicine physician who has incorporated regenerative injection therapies into his everyday pain medicine practice. He is board certified in anesthesiology, pain medicine, addiction medicine and interventional pain medicine. He graduated from the University of Utah medical school in 1985. In 1993 he graduated from an anesthesia residency at the University of Texas at San Antonio Medical Center. He is the founder, president, and Medical Director of Nexus Pain Specialists.
Dr. Rosenthal has distinguished himself as a leader in educating and training medical professionals in the fields of interventional pain and regenerative medicine. He is the editor of the interventional pain section of the widely read journal, Practical Pain Management. He has authored several scientific articles and book chapters on topics in the specialty of pain medicine. He is also involved in clinical research and has served as an expert witness in malpractice cases. His clinic was awarded the Excellence in Multi-disciplinary Pain Care award by the World Institute of Pain (one of only 4 clinics in the United States to receive the award in 2011).
Dr. Rosenthal has been practicing regenerative medicine for the past several years. He specializes in the use of stem cells and platelet-rich plasma for the treatment of painful joints, including the knee, hip, and shoulder. His treatments are based on a comprehensive approach to relieving pain and improving function. Dr. Rosenthal has lectured on the topic of regenerative medicine, especially platelet-rich plasma and stem cell treatments, for such prestigious organizations as the American Society of Interventional Pain Physicians and the Society for Pain Practice Management
George Chang Chien, DO
George C. Chang Chien, D.O. specializes in regenerative musculoskeletal medicine and comprehensive pain management. He was trained in physical medicine & rehabilitation at the Rehabilitation Institute of Chicago, the #1 ranked rehabilitation hospital in the United States since 1991. After completion of his physiatry training, he completed fellowship training in comprehensive pain medicine at the prestigious Cleveland Clinic Anesthesiology Institute.
Dr. Chang Chien has authored over 100 manuscripts on a variety of topics including regenerative medicine, orthopedics, and advanced interventional procedural medicine. He has active research in regenerative medicine applications for medical aesthetics, pain management, sports-related injuries, and has been a collaborator on multiple multi-center studies.
Dr. Chang Chien speaks regularly throughout the world on regenerative medicine and pain management. His professional teaching experience includes being a CIPS examiner for the World Institute of Pain, ABIPP examiner for regenerative medicine and interventional pain, ultrasound course director at the Cleveland Clinic, regenerative medicine course director for American Society of Interventional Pain Physicians, and the Society for Pain Practice Management.
Dr. Chang Chien specializes in all aspects of regenerative medicine and has distinct expertise in platelet-rich plasma (PRP), bone marrow aspiration for stem cells (BMAC), and adipose-derived stem cells (ADSC).
Aaron Calodney, MD
Dr. Calodney earned his medical degree from the University of Missouri School of Medicine and completed a family medicine internship at St Joseph’s Hospital in Syracuse, New York. His residency in anesthesiology and subsequent interventional pain management fellowship was completed at the University of Texas Health Science Center at Houston. He subsequently completed a fellowship in pediatric anesthesia at the Denver Children’s Hospital. After spending several years as a faculty member in the Department of Anesthesiology at the UT medical school in Houston, Dr. Calodney moved to East Texas where he has practiced since 1991.
With particular interest in spine and special interests including neuromodulation and intrathecal drug delivery, biological treatment of the painful degenerative disc, peripheral nerve injury, and radiofrequency ablation, Dr. Calodney has presented and published many articles and textbook chapters. He is actively involved in clinical research and has delivered over 250 invited lectures in the US and abroad. Dr. Calodney also specializes in treating pain through the use of regenerative medicine and implements these techniques, when applicable, into his practice.
Dr. Calodney is a member of the American Society of Anesthesiologists, American Society of Regional Anesthesia and Pain Medicine, International Spine Intervention Society, International Neuromodulation Society, American Society of Interventional Pain Physicians, North American Neuromodulation Society, Texas Pain Society, Texas Medical Association, Texas Society of Anesthesiology, and the Smith County Medical Society.
Sudhir Diwan, MD
Dr. Sudhir Diwan is a top-rated, highly-sought-after pain management specialist and serves as the executive director of Manhattan Spine & Pain Medicine. Dr. Diwan is well known for treating the most complex and challenging cases of chronic pain through numerous interventional procedures and is a leading specialist in regenerative medicine.
Dr. Diwan has provided his expertise in pain medicine to articles appearing in leading newspapers, including The New York Times and The Los Angeles Times, and has made various television appearances including Fox 5’s Good Day New York and Health Headlines on CBS for the latest research on radiofrequency lesioning for chronic back pain.
In addition to his busy pain management practice, Dr. Diwan lectures extensively and interacts regularly with experts in the field of pain medicine nationally and internationally. He has been a guest speaker for many noteworthy organizations including the American Cancer Society, the American Society of Anesthesiology, the American Society of Regional Anesthesia and Pain Medicine, the World Institute of Pain, and numerous pain specialty societies and congresses in Europe. He is also a regular speaker for the New York State Society of Anesthesiologists on the topic of pain management and management of cancer pain.
Matt Murphy, PhD
Dr. Murphy designs and implements new strategies for the isolation and application of autologous stem cells for the spine, orthopedics, and cardiovascular therapies. Dr. Murphy was a senior researcher at Methodist Hospital Research Institute in Houston, Texas, where he focused on the combination of adult stem cells and biomaterials for regenerative medical applications in orthopedics, spine, pancreatic, and soft tissue repair.
At RICE, he researched novel biomaterials for bone and cartilage regeneration and developed targeted drug delivery strategies. He also worked at NASA on the design of new spacesuits for travel to the moon and Mars as part of the Constellation Program. He has authored twelve peer-reviewed publications and two textbook chapters related to tissue engineering and drug delivery. Dr. Murphy holds a PhD in bioengineering from Rice University and a B.S. in Chemical Engineering from The University of Texas at Austin.