Two great practices just got better.

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Two great practices just got better.

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Schedule at either our Lafayette or Boulder location (please note our Boulder address: 4740 Pearl Parkway, Suite 200, Boulder, CO 80301):

Office Hours
Monday 8:00 - 5:00
Tuesday 8:00 - 5:00
Wednesday 8:00 - 5:00
Thursday 8:00 - 5:00
Friday 8:00 - 5:00


We specialize in:

Arthroscopic Surgery


|Cast Application

|Foot & Ankle

|Injection Therapy

|Magnetic Resonance Imaging (MRI)

|Neck & Spine

|Nerve Disorders

|Non-Operative Orthopedic Care

|On Site Imaging

|Physical Therapy & Hand Therapy

|Platelet Rich Plasma (PRP)

|Regenerative Medicine

|Sports Medicine

|Surgical Solutions

|Total Joint Replacement

|Trauma & Complex Fractures

Our Staff

Brian Blackwood


Brian Blackwood, M.D.

Dr. Clint Brian Blackwood, Boulder's first fellowship trained hip and knee replacement specialist is a board certified/board eligible surgeon. Originally from Montana, Dr. Blackwood joins us from his practice at the Coon Joint Replacement Institute in St. Helena, CA. Minimally invasive surgical technique with state-of-the-art joint replacement technology allows Dr. Blackwood to reduce pain, restore mobility and promote a quick return to normal activities for patients suffering from joint pain. Dr. Blackwood received his medical degree from the University of Washington in Seattle. He completed his orthopedic surgery residency at the University of New Mexico. His fellowship training was at the Coon Joint Replacement Institute with Drs. Adam Freedhand and Thomas Coon, where he was asked to stay on as a partner. He is board-eligible by the American Board of Orthopedic Surgery. During his time in California at the Coon Joint Replacement Institute, Dr. Blackwood performed nearly 1,000 joint replacement procedures. Dr. Blackwood specializes in: Minimally invasive total knee replacement surgery, Robotic-assisted partial knee and hip replacement, Direct anterior hip replacement, Complex knee and select hip revision surgery, and Knee arthroscopy. Dr. Blackwood has a longstanding connection with Boulder County. His grandparents lived in Longmont for over 50 years. His grandfather was a dentist in Longmont until his retirement, which was spent raising cattle north of Longmont. Dr. Blackwood spent many summers working on their ranch outside of town and even won a blue ribbon in the Boulder County fair showing cattle as a teenager. As an undergraduate at Carroll College in Helena, Montana, Dr. Blackwood was a 2 time Academic All-American football player. He still enjoys a variety of sports, outdoor activities, and spending time with his children. To learn more about Brian Blackwood, M.D., visit his site:

Undergraduate education: Carroll College, Helena, MT
Medical doctorate: University of Washington, Seattle, WA
Residency: Orthopaedic Residency, University of New Mexico
Fellowship: Adult Reconstruction Fellowship, Coon Joint Replacement Institute.

David J. Conyers


David J. Conyers, M.D.

Dr. Conyers has been in private practice for over 28 years in Denver and Boulder treating hand and arm problems. Though he treats a wide variety of hand and arm conditions, his areas of particular interest are microsurgery, elbow, wrist and finger arthroscopy, treatment of nerve compression disorders including endoscopic carpal tunnel release, and the treatment of wrist ligament injuries and upper extremity degenerative conditions. Dr. Conyers is a member of the Rocky Mountain Hand Society, the American Society for Surgery of the Hand and is Level 2 Accredited by the Colorado Division of Worker’s Compensation. Dr. Conyers and his wife Katie love to stay active, biking, skiing, and running. He and his son Stephen enjoy racing anything with an engine.

A Montreal native, Dr. Conyers attended McGill University in Montreal, Quebec, Canada for his undergraduate and medical school education. His orthopedic training was in the McGill residency system and he completed his fellowship in Hand and Microsurgery at the University of Colorado.

Dirk Dolbeare


Dirk Dolbeare, M.D.

Dirk W. Dolbeare, MD is a board certified orthopedic surgeon. He returns to Boulder Orthopedics after completing his residency at the Medical College of Virginia in Richmond, Virginia. Before attending medical school, Dr. Dolbeare obtained his Masters in Physical Therapy and practiced in New York, Boston and at Boulder Orthopedics. To broaden his orthopedic skills and give his patients complete and comprehensive care, he aspired to orthopedic surgery. Dr. Dolbeare is a member of the American Academy of Orthopedic Surgeons, American Medical Association and the Alpha Omega Alpha Honor Society. Heis also a delegate for the Colorado Medical Society. He is currently Orthopedic Advisor for the Bryant Mountain Ski Patrol and for the Boulder Rugby Athletic Club. Dr. Dolbeare has been the team physician for the Richmond Braves minor league baseball team and the Virginia Commonwealth University men’s and women’s basketball teams. He was also a physical therapist for the New York Knicks. He has served as a physician for high school football teams for Richmond Public Schools. Dr. Dolbeare spends his spare time hiking, back-country skiing and mountaineering with his wife and four sons.

Dr. Dolbeare earned his Masters of Physical Therapy from Boston University and his Medical Degree from the University of Arkansas for Medical Sciences. He completed his Internship in General Surgery at the University of Arkansas and his residency in Orthopedic Surgery at the Medical College of Virginia.

Lorri J. Fulkerson


Lorri J. Fulkerson, M.D.

Lorri J. Fulkerson, MD is a board certified orthopedic surgeon. Dr. Fulkerson has been practing in Boulder since 1994 and has years of extensive training and experience in Sports Medicine, including advanced arthroscopic techniques, cartilage replacement surgery, and reconstructive surgery of the knee and shoulder. Dr. Fulkerson is a Diplomat of the American Board of Orthopedic Surgery. She is a member of the American Academy of Orthopedic Surgeons, American Orthopedic Society of Sports Medicine, Arthroscopy Association of North America, Western Orthopedic Association, Colorado Medical Society, and Boulder County Medical Society. Dr. Fulkerson is a Sponsor of the National Athletic Testing Program for high school athletes in Boulder County. She is the Former Team Physician for Seattle University. Dr. Fulkerson has a long personal history of athletic involvement and is an avid skier, in-line skater, runner, hiker, and biker.

Dr. Fulkerson earned her Medical Degree from the University of California at Davis. She completed her Internship at Swedish Hospital in Seattle and Orthopedic Surgery Residency at San Francisco Orthopaedic Residency Training Program.

William C. Kramer


William C. Kramer, M.D.

Dr. Kramer is a Colorado native and a graduate of CU Boulder. He has research publications concerning the biology of cartilage and the molecular mechanisms of cartilage degeneration. He is active in ongoing research in foot deformity correction. While in college Dr. Kramer skied competitively in mogul competitions for the University of Colorado Freestyle Ski team. In 2002 he completed a 3700 mile cross country bicycle ride raising funds and awareness for people with disabilities. During medical school he participated in a medical mission trip to Guatemala. Dr. Kramer cares for degenerative conditions, traumatic and overuse injuries. With additional training in Foot and Ankle Surgery Dr. Kramer enjoys getting people back on their feet doing the sports and activities they enjoy. He enjoys skiing, water-skiing, hiking, cycling, running, golf and being outdoors. Above all he loves spending time with his wife and two boys.

He completed medical school at The University of Colorado School of Medicine then his Orthopaedic residency training at the University of Kansas Hospital in Kansas City. After which he completed a fellowship in Foot and Ankle surgery at the Medical College of Wisconsin.

Robert H. Leland


Robert H. Leland, M.D.

Robert H. Leland, M.D. is a board certified orthopedic surgeon specializing in the treatment of disorders of the foot and ankle and orthopaedic trauma as well as general orthopaedic conditions. He is a graduate of the University of Michigan in Ann Arbor and completed his medical school training at Wayne State University School of Medicine in Detroit, Michigan. Dr. Leland continued his training at Wayne State University, completing his Orthopaedic Surgery residency in 1996. After completing his residency, he pursued fellowship training in Orthopaedic Foot and Ankle Surgery at the Baylor School of Medicine in Houston, Texas and then completed an AO Fellowship in Orthopaedic Traumatology at Universitat Carl Gustav Carus in Dresden, Germany. Dr. Leland then returned to Wayne State University where he served as Assistant Professor and Chief of Foot and Ankle Surgery in the Department of Orthopaedic Surgery. In 2001, Dr. Leland moved to Boulder and joined Mapleton Hill Orthopaedics. He is Boulder’s only fellowship trained orthopaedic foot and ankle specialist. He additionally serves on the faculty of the Department of Orthopaedic Surgery at The University of Colorado as a Clinical Assistant Professor. Dr. Leland excels in non-operative and surgical treatment of both routine and complex disorders of the foot andankle including congenital, arthritic, traumatic and sports related conditions. He is one of a limited number of orthopaedic surgeons experienced at performing total ankle arthroplasty (ankle replacement) and cadaveric transplant of deficient cartilage in the ankle. He has treated professional and collegiate baseball, hockey, triathalon, cycling and track athletes as well as numerous recreational athletes. Currently, he is the “team doctor” for the Boulder Junior Bison and Rocky Mountain Roughrider hockey teams. Dr Leland additionally specializes in treating acute orthopaedic trauma as well as post traumatic deformities such as fracture malunions and nonunions. Dr. Leland is a member of the American Academy of Orthopaedic Surgeons, The American Orthopaedic Foot and Ankle Society, The AO Alumni Association, and The American Orthopaedic Foot and Ankle Scientific Trust.

Undergraduate education: University of Michigan, Ann Arbor, MI
Medical doctorate: Wayne State University, Detroit, MI
Residency: Orthopaedic Residency, Wayne State University, Detroit, MI
Fellowship: Foot and Ankle Fellowship, Baylor School of Medicine, Houston, TX

Daniel Master


Daniel Master, M.D.

Dr. Master attended Georgetown University for his undergraduate studies where he graduated Magna Cum Laude with a Bachelor of Arts in Psychology and a concentration in Pre-Medicine. Following this, he attended medical school at the University of Connecticut School of Medicine and graduated with honors in General Surgery and Orthopaedic Surgery. Dr. Master was then accepted into the prestigious Orthopaedic Surgery residency program at University Hospitals Case Medical Center in Cleveland, Ohio. During his time in Cleveland, Dr. Master was awarded an Allen Research Fellowship which allowed him to spend an entire year devoted to clinicaland basic science research. Dr. Master’s research focused on hand and upper extremity surgery as well as spine surgery. His research was funded by a grant from the National Institute of Neurological Disorders and Stroke, a division of the National Institute of Health. In addition,his research was presented at multiple national and international meetings with great success. Due to the quality of his research, he was awarded the Jacquelin Perry Award from the Orthopaedic Rehabilitation Association, the Mayfield Basic Science Award from the American Association of Neurological Surgeons, and the Barry Friedman Award from the Orthopaedic Research Laboratories. He is a board certified/board eligible surgeon. During Dr. Master’s clinical training in Cleveland, he perfected surgical techniques in hand and upper extremity surgery. After completing residency, he accepted a fellowship position at the prestigious Stanford Hand and Upper Limb Fellowship at Stanford University Medical Center. At Stanford, Dr. Master developed the skills to perform minimally invasive surgery throughout the hand and upper extremity. More specifically, he became a skilled wrist arthroscopist and he learned minimally invasive techniques for the treatment of carpal tunnel syndrome, carpometacarpal arthritis and wrist ligament injuries. He also developed skills to perform primary and revision arthroplasty of the shoulder, elbow, and wrist for the treatment of arthritis. Dr. Master also gained significant experience with the treatment of Dupuytren’s disease including the use of Xiaflex (collagenase) injections. Finally, Dr. Master has extensive experience with tendon transfer surgery for quadriplegic and stroke patients as well as pediatric hand surgery. Following the completion of fellowship, Dr. Master joined Mapleton Hill Orthopaedics, P.C. in Boulder, CO. He lives with his wife and children in Boulder, CO. In his spare time, he enjoys rock climbing, backpacking, telemark skiing, and, most of all, spending time with his family. To learn more about Dr. Master’s hand, wrist, elbow, and shoulder practice, please visit: Dr. Master specializes in hand, wrist, elbow, and shoulder surgery including: Endoscopic carpal tunnel release; Thumb, finger, wrist, elbow, and shoulder arthoscopy and joint replacement, Hand, wrist, forearm, elbow, arm, and shoulder fracture treatment and complex revision surgery in both adults and children; Minimally invasive treatments for Dupuytren's disease including Xiaflex (collagenase) injections; Digit Widget application, and surgical treatment (fasciotomy and/or fascietomy); Complex peripheral nerve surgery; Upper extremity nerve transfers and tendon transfers for nerve injury and spinal cord injury.

Undergraduate education: Georgetown University, Washington, D.C.
Medical doctorate: University of Connecticut School of Medicine, Farmington, CT
Residency: Orthopaedic Residency, University Hospitals Case Medical Center, Cleveland, OH
Fellowship: Hand and Upper Limb Fellowship, Stanford University Medical Center, Stanford, CA

Stephen D. Paul


Stephen D. Paul, M.D.

Stephen D. Paul, MD is a board certified orthopedic surgeon with over 16 years of experience. Dr. Paul’s special interest is in arthroscopic surgery of the shoulder, knee, and ankle. He has trained in Sports Medicine, specifically for trauma and reconstructive surgery related to cycling and skiing. Dr. Paul is a Diplomat of the National Board of Medical Examiners. He is a member of the American Academy of Orthopedic Surgeons. Dr. Paul was the physician coordinator for the US Olympic Festival in Boulder. He has served as a physician for downhill ski racing in Aspen, local cycling events, and football and soccer for the Denver Public Schools. In his spare time, Dr. Paul enjoys spending time with his wife, mountain biking, back country skiing, telemarking, and mountaineering in the beautiful Colorado Rockies.

Dr. Paul earned his medical degree from the University of Colorado School of Medicine. He completed his Internship at the University of Colorado Affiliated Hospitals in Denver, Orthopedic and Rehabilitation Residency at Rancho Los Amigos Medical Center in Los Angeles, and Sports Medicine Fellowship at the University of Colorado and Orthopedic Associates of Aspen and Glenwood in Aspen, CO.

James B. Rector


James B. Rector, M.D.

James B. Rector, MD has been a board certified orthopedic surgeon for over 30 years. He is one of the first surgeons in the United States to perform state-of-the-art hip resurfacing. As a physician and team doctor, Dr. Rector has a special interest in arthroscopic knee surgery. He has extensive training and experience in total hip and total knee replacement surgery. Dr. Rector is a member of the American Academy of Orthopedic Surgeons, American Orthopaedic Society for Sports Medicine, American Board of Orthopaedic Surgery, American Medical Association, Boulder County Medical Society, and Colorado Medical Society. Dr. Rector has served as the Team Physician for Boulder High School since 1980. He presents numerous community information seminars about total joint replacement and arthritis in Boulder, CO and surrounding areas. Dr. Rector is a proud Sponsor of the Boulder Bicycle Classic. In his spare time, Dr. Rector enjoys bicycling, skiing, trap shooting, fly fishing, and participating in softball.

Dr. James Rector earned his Medical Degree from the Ohio State University College of Medicine. He completed his Internship at the Ohio State University Hospital and Orthopedic Surgery Residency at the University of Colorado Health Sciences Center in Denver.

Khemarin Seng


Khemarin Seng, M.D.

Dr. Khemarin Seng is a board certified, fellowship trained orthopedic surgeon specializing in sports medicine and arthroscopy. He has a focused interest in hip arthroscopy, shoulder reconstruction and replacement. After graduating from medical school at the University of Colorado School of Medicine, he completed his orthopedic surgical residency at Harvard Medical School. He served as intern at Brigham and Women’s Hospital and orthopedic surgical resident at Massachusett General Hospital, Brigham and Women's Hospital, Beth Israel Deaconess Hospital and Children’s Hospital of Boston. After residency, he completed a sport medicine and arthroscopy fellowship at the Taos Orthopaedic Institute in Taos, New Mexico. Dr. Seng is a current member of the United States Ski and Snowboard Association volunteer physician pool andreviewer for The Journal of Arthroscopy and Related Surgery. Dr. Seng's philosophy towards patient care centers around a triangle of wellness. This triangle is defined by 3 points: the patient, the injury and the patients goals. At the center of this triangle is the heart of his treatment strategies. These strategies may include education, reassurance, surgical and non-surgical measures. Dr. Seng believes that education and information are empowering. He prides himself on staying updated with current literature, keeping an eye on evolving technology and understanding his patients’ needs and concerns.

Undergraduate education: University of California Irvine. Irvine, CA
Medical doctorate: University of Colorado. Denver, CO
Orthopaedic Residency: Harvard University School of Medicine. Boston, MA
Sports medicine Fellowship: Taos Orthopaedic Institute, Taos, NM

Lynn A. Voss


Lynn A. Voss, M.D.

Lynn A. Voss, MD has been a board certified orthopedic surgeon for over 8 years. Dr. Voss has expertise in treating people with emergency multiple traumatic injuries. Dr. Voss has been awarded for teaching medical students about emergency orthopedics. He has taught physicians in Switzerland about methods of fracture care and is a requested trauma surgeon both locally and internationally. Dr. Voss is a member of the American Board of Orthopedic Surgery, Orthopedic Research Society, and American Academy of Orthopedic Surgeons. Dr. Voss has served as a physician for Olympic Athletes and their coaches, professional hockey players, Hawaii ironman triathletes, pro motorcross competitors, pro cyclists, and former Broncos and Rapids players. In his spare time, Dr. Voss enjoys hiking, skiing, and competing in triathlons.

Dr. Voss earned his Medical Degree from the University of Health Sciences at the Chicago School of Medicine. He completed his Internship, Orthopedic Surgery Residency, and Trauma Fellowship at Rhode Island Hospital at the Brown University School of Medicine. Dr. Voss earned several awards for research during his training.

Drigan Wieder


Drigan Wieder, M.D.

Dr. Drigan Wieder considers his patients as friends. He loves that no patient or surgery is ever the same and each offers a unique challenge. His energy and enthusiasm for his work make him an approachable, fun doctor—the kind you can look forward to seeing. Dr. Wieder is a Boulder native, and he began his interest in medicine at an early age. When he was about twelve years old, he crushed his finger in a climbing accident, and visited with an orthopedist who encouraged his interest by chatting with him about medicine. The orthopedist even offered to let the future Dr. Wieder go on rounds with him! Years later, after multiple broken bones from an active sports career, he graduated with the Boulder High class of 1974. Dr. Wieder completed his undergraduate degree at the University of Colorado at Boulder and went on to earn his medical degree from the University of Colorado School of Medicine. He completed his Residency training in Orthopaedic Surgery at the University of Utah Medical Center in 1992. Upon completing his residency, Dr. Wieder joined the Mapleton Hill team in Boulder. He is a board certified orthopaedic surgeon. He has worked with a large spectrum of patients from marathon runners to senior citizens. Dr. Wieder has developed a specialty in sports medicine and astrong interest in arthroscopic shoulder and knee reconstructions. He has performed hundreds of these types of surgeries on Boulder’s young, active population. Dr. Wieder and his wife live in Sunshine Canyon in Boulder with their two children. He is an avid outdoorsman and enjoys backpacking, fly-fishing, skiing and cycling in the Colorado outdoors.

Undergraduate education: University of Colorado, Boulder, CO
Medical doctorate: University of Colorado, Boulder, CO
Residency: Orthopaedic Residency, University of Utah Medical Center, Salt Lake City, UT

Elizabeth F. Yurth


Elizabeth F. Yurth, M.D.

Dr. Yurth is one of only a handful of non-surgical musculoskeletal specialists with extensive specialty fellowship training in Spine and Sports Medicine. This specialty training- along with her experience treating professional, collegiate and recreational athletes- ensures her patients of the best and most advanced medical care possible. Having faced multiple athletic sports injuries herself including tearing both her anterior cruciate ligaments skiing and a severe ankle fracture from climbing- she can identify with the frustrations of the athlete recovering from an injury and their need for a personal, compassionate approach to their treatment. Dr. Yurth came to Colorado in the fourth grade and has grown up in an active family skiing and hiking the Rocky Mountains. She attended Littleton High School and received a Scholarship to the University of Colorado where she graduated with honors. She then relocated to California where she attended the University of Southern California Medical School graduating at the top of her class with honors including AOA, The Dean’s Award and several other awards for academic excellence. Her internship and residency were completed at the University of California Irvine and she is board certified in Physical Medicine and Rehabilitation (Physiatrist). Following her residency, Dr. Yurth was selected for a highly competitive fellowship in Spine and Sports Medicine with SOAR (Sports, Orthopaedic and Rehabilitation Medical Association), an organization associated with Stanford University where she had the opportunity to learn from leaders in the field of spine and sports medicine. There she had the opportunity to work with the San Fransisco 49ers, Santa Clara University basketball, football and soccer and Stanford women’s basketball and soccer. She also acted as the physician for the San Jose/Cleveland Ballet. She is board certified/board eligible. After several years in Northern California, Dr. Yurth jumped at the opportunity to move home to her beloved Boulder and be back close to her family. She now brings her unique experience in non-surgical orthopaedics here to the Boulder area. Dr. Yurth is a firm believer that many musculoskeletal injuries (back, neck, shoulder, knee, etc) can be treated successfully without surgical intervention. Particularly when treating complicated problems such as neck and back injuries, Dr. Yurth believes patients need to know ALL the treatment options available-both surgical and non-surgical in order to make an informed decision as to the best treatment plan for them. Her primary goal is to take the time needed for the patient to educate them about their injuries or disease and work together with them to help plan their best course for recovery. Though Dr. Yurth enjoys treating all types of orthopaedic problems, her training in Interventional Physiatry has given her a focus on treating spinal injuries. She is trained in numerous exciting new procedures for treating neck and back problems including all types of spinal injections, Intradiscal electrothermal annuloplasty (a procedure which uses thermal energy to treat disc problems), percutaneous decompression (uses a suction device to non surgically remove disc protrusions and help back and leg pain), and pulsed radio frequency neurolysis (uses radio frequency waves to treat specific types of back pain). Dr. Yurth has lectured across the country and is published in leading journals on topics including the treatment of lower back pain, non-operative management of disc herniations, nerve injuries in sports, care of the female athlete and preventing osteoporosis. Dr. Yurth is an avid runner, cyclist, climber and skier with extensive experience in sports specifically weight training. She is married and has five young children so is back on the sidelines again watching her children play soccer, football, basketball and ski.

Undergraduate education: University of Colorado, Boulder, CO
Medical doctorate: University of Southern California
Residency: Physiatry Residency, University of California Irvine, Irvine, CA
Fellowship: Spine, Sports, and Occupational Medicine Fellowship, Stanford University Medical Center, Stanford, CA

Kelli Eisenbrown


Kelli Eisenbrown, PA-C

Kelli was born and raised in the college town of Gainesville, Florida. She attended The University of Florida where she graduated Cum Laude with both a Bachelor of Health Science and a Minor in Education. She moved to Colorado in 2008 and earned a Master’s degree in Physician Assistant Studies from the University of Colorado Denver. During her undergraduate studies, Kelli was a four-year member of the Division I varsity women's soccer team (Go Gators!), and subsequently went on to play semi-pro for the Tampa Bay Elite. Her time as a competitive athlete allows her to fully empathize with patients trying to get back to high-level activities following injuries. Kelli has over 10 years of combined clinical and research experience in many areas of medicine, including cardiology, physical therapy, primary care, pediatrics, and rehabilitation science. Prior to joining Boulder Centre for Orthopedics, Kelli worked as a PA in pediatric primary care, thus she loves seeing patients of all ages. In her current role, she works primarily with Dr. Daniel Master and specializes in hand and upper extremity. Outside of medicine, Kelli enjoys climbing, backpacking, snowboarding, biking, yoga, traveling, and playing guitar. She has a passion for orthopedics and is honored to serve the patients of Boulder and its surrounding communities.

Undergraduate Education: Bachelor of Science and Minor in Education, The University of Florida
Graduate Education: Master of Physician Assistant Studies, The University of Colorado Denver

Timothy H. Graves


Timothy H. Graves, PA-C

Tim has been a certified physician assistant since 2007 and he has worked in orthopedics since that time. Outside of medicine, Tim enjoys spending time with his wife and two daughters and getting outside as much as possible to run, hike, ski and ride his bike.

He received a BS in Exercise Science from the University of South Carolina, a MS in Applied Physiology from Boston University and a MMSc from the Yale University PA program. Prior to joining Boulder Orthopedics, Tim resided in Massachusetts where he gained experience working for academic, hospital based and private orthopedic groups.

Cheryl Hartshorn


Cheryl Hartshorn, PA-C

Cheryl was born and raised in Spokane, WA. She became interested in Orthopedics after a soccer injury resulted in an ACL reconstructive surgery and a summer internship with the orthopedic surgeon. Cheryl attended Colorado State University where she received a bachelor of science in biology. Cheryl continued at CSU as a graduate research assistant where she earned a research-based masters degree in biomedical sciences. While a graduate student, Cheryl received a National Science Foundation GK12 fellowship to design, teach and incorporate new science and math curriculum into local Fort Collins high schools. Cheryl decided basic science research wasn’t her passion, so she moved to Denver to attend the Physician Assistant Program at the University of Colorado Denver. Cheryl graduated with a Masters in Physician Assistant Studies in May 2013. She’s excited to work at Mapleton Hill Orthopedics. She is certified by the National Commission on Certification of Physician Assistants. Cheryl currently lives in Boulder: she enjoys running, water sports, soccer, skiing, traveling and spending time with her friends, family and her English Mastiff, Abby.

Undergraduate Education: Colorado State University
Graduate Education: Masters of Science, Colorado State University Masters of Physician Assistant Studies University of Colorado Denver

Lori Nacius


Lori Nacius, PA-C

Lori hails from Chicagoland, now calling Boulder home. After a first-career as an Outward Bound instructor, Lori decided to change careers and pursue a medical vocation. She attended Baylor College of Medicine in Houston, TX where she earned her MS in Physician Assistant Studies. She returned to the Boulder area in 2012 and has been working as a sports medicine PA ever since. Being a PA is a great venue to exercise Lori’s passion for working with injured people in a capacity to bring them back to a healthy state. Whether her patient is a professional athlete, a college student looking to improve fitness level, or a retired person focused on maintaining health, Lori believes that everyone deserves the time and attention from their medical provider to create a blueprint to help them accomplish their health and wellness goals. When she isn’t working with patients, you will likely find Lori outdoors, cycling, running, backpacking, or gardening. She also enjoys cooking and travel.

Matthew Schneider


Matthew Schneider, PA-C

Matt Schneider, PA-C, ATC, MS has been a board Certified Physician Assistant for over 7 years. He has also been a Certified Athletic Trainer for over 15 years. With a special interest in sports medicine, Mr. Schneider has provided medical care to numerous professional athletes as well as providing medical coverage at the finish line of the Ironman Triathlon World Championships. Mr.Schneider is a member of the American Academy of Physician Assistants (AAPA) and the Colorado Academy of Physician Assistants (CAPA). He is actively pursuing a specialty certification in orthopedics and orthopedic surgery. While attending the University of Akron, Matt also was a member of the Division I Varsity Soccer Program. After college, he took up an interest in endurance sports. He has qualified and competed in the Ironman Triathlon World Championships, US National Long Course Triathlon Championships, and the Boston Marathon. He enjoys spending quality time with his wife, son and their two dogs, Tolliver and Rooney.

Matt earned his Bachelor’s of Science and Master’s of Science at The University of Akron, Ohio. Mr. Schneider earned his Physician Assistant degree at Red Rocks Community College, one of only two physician assistant programs in the state of Colorado. In addition to his sports medicine background, Mr. Schneider also has extensive experience working at a Level I Trauma Hospital in Denver.

James D. Thomas


James D. Thomas, PA-C

James has been a certified Physician Assistant since 2006. Outside of medicine James' other passion is cycling. He raced with the Yale University road cycling team from 2005 to 2006 and competed in the Northeast region for 12 years. He also enjoys mountain biking, track cycling, skiing and hiking.

He graduated with a BA in psychology from Williams College in 1999. He received a master's degree from Yale University in 2006. After graduation he worked for the Orthopedic Speciality Group in Fairfield, Connecticut where he gained experience in joint replacement surgery. Before moving to Colorado he spent 6 years practicing sports medicine in Cape Cod, Massachusetts. He specialized in knee and shoulder arthroscopy and provided care for the Cape Cod Baseball League.

BoulderCentre for Orthopedics

Boulder Orthopedics and Mapleton Hill Orthopaedics are proud to announce their merger. We are the BoulderCentre for Orthopedics.

Since 1968, our community of orthopedic surgeons have been serving the needs of Boulder and the entire Front Range. Healing musculoskeletal injuries suffered by our patients is our focus. We promise to do our best to keep you moving, healthy, and well. Patient care has always been a priority and will continue to be our focus at the Centre.

Come visit us at our new location: 4740 Pearl Parkway, Suite 200, Boulder, CO 80301. Our new space facilitates state-of-the-art care and imaging. We are conducting business as usual with comprehensive orthopedic and therapy services at our satellite location in Lafayette.

BoulderCentre for Orthopedics will continue to have physicians on staff at Boulder Community Health, Avista Adventist and Lutheran Medical Center. Ambulatory surgery will continue to be performed at the Boulder Surgery Center.


Boulder Centre for Orthopedics


4740 Pearl Parkway, Suite 200

Boulder, CO 80301

Fax: 303.449.5821


1000 W. South Boulder Rd, Suite 218

Lafayette, CO 80026

Fax: 303.449.5821

To Make Appointments


Email us: Boulder Centre