The doctors below are part of the Centeno-Schultz Clinic in Broomfield, CO (Regenexx Headequarters). For a complete listing of network providers throughout the United States, visit our Find a Physician Page.

Christopher Centeno, M.D.

Dr. Chris Centeno

Christopher J. Centeno, M.D. is a specialist in regenerative medicine and the new field of Interventional Orthopedics.  He is board certified in physical medicine/rehabilitation and in pain management.

Dr. Centeno is one of the few physicians in the world with extensive experience in the culture expansion of and clinical use of adult stem cells to treat orthopedic injuries.  He is a founding member of the International Cellular Medicine Society as well as the Spinal Injury Foundation.  His clinic incorporates a variety of pain management techniques and he treats patients from all over the US and the world who travel to Colorado to under-go innovative, non-surgical treatments. Dr. Centeno’s clinical practice in Colorado (The Centeno-Schultz Clinic) has a state of the art cell biology research lab, a bioengineering department, and a clinical research arm.

Dr. Centeno has chaired multiple international research based conferences.  He also maintains an active research based practice, with multiple publications listed in the US National Library of Medicine.  Dr. Centeno has also served as editor-in-chief of a medical research journal dedicated to traumatic injury. He has lectured all over the world on regenerative therapies including the Vatican in Rome.

Dr. Centeno trained at the Baylor College of Medicine, Texas Medical Center and the Institute for Rehabilitation Research.  He hails from both Florida and New York and currently resides in Boulder, Colorado with his wife and three children. More >>

John R. Schultz, M.D.

Dr. John SchultzJohn R. Schultz, M.D. is an interventional pain management specialist and is double-boarded in both Anesthesiology and Pain Management. He is a member and prior instructor for the International Spine Intervention Society (ISIS) and holds state licensure in Utah, Colorado and North Carolina.

Dr. Schultz trained at the Michael Reese Hospital and Medical Center, Children’s Hospital of Philadelphia, and Bowman Gray School of Medicine and currently serves as Co-Medical Director of The Centeno-Schultz Clinic. He has published numerous works in the field of anesthesiology and regenerative science and brings 20 years of experience to Regenerative Sciences, Inc, and its Regenexx patients and partners.

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Ben Newton, M.D.

Dr. Ben NewtonDr. Newton is originally from Salt Lake City, Utah. He completed his residency in Burlington, Vermont where he actively participated in sports medicine coverage opportunities at the high school and university levels. He also covered several US Ski and Snowboarding events in Killington, Vermont.

Dr. Newton completed his Primary Care Sports Medicine Fellowship in Cincinnati, Ohio where he worked with various teams at high school, college and professional levels. He enjoyed time at Xavier University (Division I) and College of Mount St. Joseph (Division III) where he covered football, basketball, soccer, wrestling, lacrosse and rugby, as well as being one of the sports medicine physicians for the Cincinnati Reds. He also provided regular game coverage and medical care to the Cincinnati Commandos (men’s indoor professional football) and the Cincinnati Sizzle (women’s full contact football). He had the opportunity to do medical coverage for the USA Olympic Boxing Last Qualifier, the Cincinnati Marathon and the Coaches Classic – Gymnastics Tournament (levels VII – elite).

During his sports medicine fellowship, Dr. Newton was able to learn and use musculoskeletal ultrasound (MSK US) for the diagnosis and treatment of many acute and chronic musculoskeletal injuries. He further developed his diagnostic and procedural skills, by doing an additional fellowship year in interventional orthopedics and regenerative medicine with the physicians at the Centeno-Schultz Clinic.

Dr. Newton is board certified in family medicine and sports medicine.

He loves being outdoors, playing sports and hanging out with his family (wife and three young kids).

John A. Pitts, M.D.

dr_john_pitts_bioDr.  Pitts is originally from Chicago, IL but is a medical graduate of Vanderbilt School of Medicine in Nashville, TN.  After Vanderbilt he completed residency in Physical Medicine and Rehabilitation (PM&R) at Emory University in Atlanta, GA.  The focus of PM&R is restoration of function and quality of life.    In residency he gained much experience in musculoskeletal medicine, rehabilitation, spine and sports medicine along with some regenerative medicine.  He also gained significant experience in fluoroscopically guided spinal procedures and peripheral injections.   However, Dr. Pitts wanted to broaden his skills and treatment options beyond the current typical standards of care.

Thus, he came to Colorado as a fellow to learn more about regenerative medicine and interventional orthopedics as well as to further develop his skills in fluoroscopic guided procedures, diagnostic ultrasound and interventional ultrasound.  He has been involved in research and development of the regenerative procedures and post procedural rehabilitation.  He completed his fellowship this year and is excited to stay on as a staff physician.  Additionally he has interests in nutrition, supplements, and complementary and alternative medicine.   He has written and published a nutrition guide; 21st Century Guide to Nutrition and Health.  Dr. Pitts believes in taking a holistic approach to patient care.  He is excited to continue to learn and develop his career around regenerative medicine.

Dr. Pitts is board certified in Physical Medicine and Rehabilitation.

In his spare time he enjoys all outdoor activities, sports, running, hiking, lifting weights, Crossfit, biking, and traveling with his wife

Jamil Bashir, M.D.

Dr Jamil Bashir


2006 – B.S. in Biology (magna cum laude), B.S. in Biochemistry (magna cum laude), University of Maryland, College Park, Maryland

2010 – M.D., University of Maryland School of Medicine, Baltimore, Maryland


2003 (Spring) – Emergency Medical Training, Baltimore City Community College, Baltimore, Md.

2003 (Fall) – National Registry of Emergency Medical Technicians (EMT) Certification

2006 (Spring) – ACLS training, Georgetown University, Washington, DC

2009 (Spring) – RYT Yoga Teaching Instruction (coursework completed), Baltimore, Maryland

Association Memberships

AAPM&R-Resident Member, University of Miami, Miller School of Medicine, 2011-present
American Medical Association, Member, 2011-present


Pilot Study investigating the benefit of Mesenchymal Stem Cell Injections for facetogenic pain, University of Miami Miller School of Medicine & Interdisciplinary Stem Cell Institute