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Our Practitioners

Our American Board Certified practitioners have years of clinical expertise

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Tom Colburn
ABC Certified Orthotist, Pedorthist, CO, CPed, FAAOP

Tom Colburn is a Certified Orthotist, Certified Pedorthist & Fellow of the American Academy of Orthotists and Prosthetists. He earned his bachelors degree from Brown University and Certificates in both Orthotics and Prosthetics from Northwestern University. Tom is an Associate Professor at Tufts University School of Medicine, and has been part of the Tufts Medical Center clinical team since 1983. He has specialized in the areas of pediatric orthotics, adult foot and ankle and has particular expertise in spinal orthotic management. He has lectured at many hospitals, universities and scientific symposia throughout the United States and Europe. Tom served nationally on the Board of Directors of the American Academy of Orthotists & Prosthetists and as Chair of the Academys Spinal Orthotic Society.

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Mike Bonnar
ABC Certified Orthotist, CO

Michael Bonnar is a Certified Orthotist. His education includes a 2003 Post Graduate Orthotic Certificate from The University of Connecticut, a 2001 Bachelor of Science in Exercise Physiology from The University of Massachusetts, and a 1997 Associate in Science in Physical Therapy from Bay State College. Mike carries out patient care with Pediatric, Orthopedic, Neurology, craniofacial, and sports medicine physicians. Cases include congenital disabilities, scoliosis, sports medicine, and trauma. Mike specializes in the design, manufacture, and fitting of orthotic devices made to the specific functional goals of his patients. He has implemented carbon, metal, and plastics knowledge to create custom fitting devices that will work with the patient and the rehabilitative team to assist with improving the function of his patients. Related work experience 1994-2010 included patient care and fabrication of orthotics for Childrens Hospital-Boston, Beth Israel Deaconess Medical Center, and The Joslin Diabetes Center of Boston, MA. He maintains ABC certification in Orthotics and Licensure as a Physical Therapist Assistant in Massachusetts.

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Mauricio Ventura
Board of Certification Orthotist, BOCO
ABC Certified Fitter Orthotists, CFO

Mauricio Ventura is a practitioner at the Orthotics and Prosthetics Center of Boston. An ABC-certified Fitter since 2004 and certified BOC Orthotist since 2010, he joined the team in the Spring of 2009. He was a practitioner in Boston, on Brookline Avenue, for three years, where he concentrated on the orthopedic needs of the Beth Israel Deaconess Medical Center. Previously, he was the head technician at Childrens Hospital Brace Shop for 14 years. He served as an assistant instructor at the annual Boston Brace Course in Avon, Ma throughout his career at the Longwood Medical Center. Mauricio attended Bunker Hill Community College. He has completed numerous continuing education courses keeping abreast of the most recent advancements on the field of orthotics.

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Katie Bisutti
ABC Certified Orthotist, CO

Katie Bisutti is a Certified Orthotist in our Braintree office. She is a graduate of The Pennsylvania State University with a Bachelor of Science in Kinesiology with a focus on the science of human movement. She earned her graduate certificates in Orthotics and in Prosthetics from Northwestern University. Katie completed her Orthotic Residency with the Orthotic and Prosthetic Centers at Tuft's Medical Center and the Floating Hospital for Children. She has worked alongside Pediatric Orthopedic Surgeons and Physiatrists in musculoskeletal specialty clinics and has a passion for working with children and young adults. Her past experience includes patient care and technical fabrication at Allegheny Orthotics and Prosthetics in Altoona, Pennsylvania as well as patient care at Mount Nittany Medical Center diabetic wound care clinic in State College, Pennsylvania. Katie works with both adult and pediatric patients in the evaluation and fitting of orthotic devices tailored to each patient's functional and personal goals. Katie has a particular interest and area of expertise in cranial remolding helmets in treating infants with cranial asymmetries.

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Sarah Bui
ABC Certified Prosthetist, Orthotist, CPO

Sarah earned her Bachelors of Science degree in Prosthetics and Orthotics from the University of Washington's School of Medicine, Seattle. She had an extensive variety of internships throughout the Pacific Northwest; of which she incorporates into her clinical care with our O&P Centers team at Tufts Medical Center in Boston. She is bilingual, speaking fluent Vietnamese. Sarah has particular interest in humanitarian and philanthropic work and is currently active in a variety of charitable causes and events.

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Nicholas Grigorieff
ABC Certified Prosthetist, Orthotist, CPO

Nicholas Grigorieff brings over 30 years experience in Orthotics and Prosthetics serving as Director to our Concord Massachusetts office. Nick graduated from the University of Washington's School of Rehabilitative Medicine with a Bachelor's Degree in Prosthetics and Orthotics. Nick began his post graduate career at Boston's Children's Hospital and Rhode Island Hospital where he concentrated on Scoliosis, Spina Bifida, Cerebral Palsy and general orthopedics. He prides himself on helping his patients reach their goals and obtain the best possible outcomes. Nick is a member of the American Academy of Orthotists and Prosthetists.

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John Zakrzewski
ABC Certified Prosthetist, Orthotist, CPO

John Zakrzewski brings over 15 years experience in prosthetics and orthotics, servicing patients from Boston, South Shore and Cape Cod regions. Johns clinical strengths include upper and lower limb prosthetics, including expertise with myoelectric and microprocessor technology integration. John also specializes in adult foot and ankle orthotic management. He has been part of multi-disciplinary rehabilitation clinics managing the needs of both prosthetic and orthotic patients. He has had concentrated studies in sports medicine and movement science and currently holds certification from the American Board of Certification in Orthotics and Prosthetics.

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Stephen Millham
ABC Certified Orthotist, CO

As a Certified Orthotist, Stephen Millham brings 30 years of Orthotic and Prosthetic experience to the O&P Centers, in both a practitioner and technical capacity. Stephen attended an Orthotics & Prosthetics Technician Training Program from 1979 to 1980, and went on to work in both the orthotic and prosthetic field. He spent 15 years as part of the orthopedic staff at Massachusetts General Hospital, where he worked in conjunction with Bostons professional sports teams trainers doing knee bracing for athletes. His experience also includes working with pediatric burn patients at Boston Shriners Hospital. He prides himself in metal fabrication, as well as leather and plastic. Stephens clients benefit from his expertise, experience, and knowledge of industry advancements.

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Robert Stamm
ABC Certified Prosthetist, CP

Rob Stamm is a Certified Prosthetist at The Orthotics and Prosthetics Centers. He graduated from the University of Buffalo with a BA in Design Studies and received a Post Graduate Certification in prosthetics from California State University Dominguez Hills. He began his prosthetic career at Hanger in Colorado and joined The O and P Center team in 2010. Rob enjoys the many aspects of helping patients meet their prosthetic needs from evaluation to modification and fabrication to fitting. He focuses on developing a plan with a patient and seeing the process through to completion. He has a background in design, adaptive equipment, and physical rehabilitation which he draws from in order to best meet a patient's individual goals. He maintains ABC certification in prosthetics.

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George Boutross
ABC Certified Prosthetist, Orthotist, CPO

George Boutross is an ABC Certified Prosthetist / Orthotist and fellow of the American Academy of Orthotists and Prosthetists. He received his orthotic and prosthetic training and education from New York University Medical School. As the Director of the Braintree office, George brings 32 years of experience to the practice as well as a 3-tiered multidisciplinary team approach of physician, physical therapist and orthotist / prosthetist, optimizing the formulation of device and treatment options for the patient. George specializes in serving the needs of the adult population and welcomes the challenges of complex cases.

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Daniel Kincade
ABC Certified Prosthetist, CP

Daniel Kincade is an ABC Certified Prosthetist at the Orthotic and Prosthetic Centers. He earned his prosthetic certificate from Northwestern University and after completing his residency in Connecticut he joined the O & P Centers team early in 2015. Daniel is dedicated to helping his patients reach their highest functional goals.

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