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George A. Frey, MD George A. Frey, MD - is a board certified Orthopaedic Spine Surgeon and the founder of the Colorado Comprehensive Spine Institute. Dr. Frey has focused his medical practice on the treatment of all complex problems of the spine including cervical, thoracic, and lumbar regions in the adult as well as the child. |
| Mary Jane Bennett, MSN, FNP Mary Jane is a Nurse Practitioner with a wide range of experience, from the Emergency Room through Interventional Spine Pain Management. |
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Woosik M. Chung, MD Woosik M. Chung, MD, is a fellowship trained spine surgeon. His surgical interests involve the treatment of advanced degenerative spine as well as complex scoliosis deformity, with a special focus in the disorders of the neck. |
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Jonathan N. Clapp, MD, MS John Clapp, MD is a physiatrist with a special interest in treating patients with acute and chronic neck and low back pain. Dr. Clapp completed his residency in Physical Medicine and Rehabilitation at Chicago's Rush University Medical Center. The focus of Dr. Clapp's training has been on pain management, sports medicine, electro diagnostics and interventional spine procedures. |
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Andrew Davalt, PA-C Andrew Davalt is a Physician Assistant at the Colorado Comprehensive Spine Institute (CCSI). He works closely with CCSI’s spine surgeons in the clinic, hospital, and assisting in the operating room. |
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Katey Dorweiler, PA-C Katey Dorweiler is a Physician Assistant at the Colorado Comprehensive Spine Institute (CCSI). She works in support of Dr. Timothy Kuklo. |
| Denise Ferguson Denise is the Administrator for CO Comprehensive Spine Institute. Her position includes oversight for the billing department, human resources and clinical operations. Denise has worked 20 years in the medical industry and has proven herself as an advocate for patient care and quality customer service. |
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Mark R. Haddock MBA, MSHA Mr. Haddock has been Finance Manager for Colorado Comprehensive Spine Institute and the Englewood Surgery Center since August, 2007. Prior to his current position he served eight years as Finance Manager and General Manager for Service Corporation International's western division, with headquarters in North Hollywood, California. |
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Timothy R. Kuklo, MD Timothy R. Kuklo, MD is a board certified Orthopaedic Surgeon and fellowship trained spine surgeon specializing in diverse spinal conditions of the cervical, thoracic and lumbar spine. |
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Thomas C. Sanders, PA-C Thomas C. Sanders, PA-C - is a physician assistant at CCSI. Working closely with Dr. Frey in clinic, hospital and surgery arenas for four years, Tom has learned from his vast expertise in the diagnosis and treatment of spinal disorders and is a dedicated member of our health team. |
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Kevin Schmidt, MD, MBA Kevin Schmidt, MD, MBA is a fellowship trained interventional pain management specialist. |
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William Thompson, MD William Thompson, MD is a fellowship trained interventional pain management anesthesiologist. |

