Anthony P. Fiegen, MD
Specialties – Areas Of Focus
SHOULDER
• Surgical and non-surgical treatment
• Shoulder arthritis
• Anatomic total shoulder arthroplasty
• Reverse total shoulder arthroplasty
• Revision shoulder arthroplasty
• Rotator cuff repair
• Lower trapezius transfer
• Superior capsular reconstruction
• Biceps tenodesis
• Shoulder instability
• Labral repair and bony reconstruction
• AC joint pathology
• Shoulder replacement
KNEE
• Knee pain
• Surgical and non-surgical treatment
• Knee arthroscopy
• ACL repair
• ACL reconstruction
• Multi-ligament knee injuries: ACL/PCL/MCL/posterolateral corner
• Meniscus tears
• Meniscus repair
• Meniscus allograft transplant
• Patellar instability
• Medial patellofemoral ligament reconstruction
• Tibial tubercle osteotomy
• High tibial osteotomy
• Cartilage restoration
• Osteochondral allograft transplantation
• Cellular based cartilage restoration|
• Partial knee replacement
• Full knee replacement
• Total knee arthroplasty
• Robotic assisted knee replacement
HIP
• Hip pain
• Hip arthroscopy
• Femoroacetabular impingement (hip impingement)
• Hip labral repair
• Iliopsoas tendon impingement
• Anterior approach total hip arthroplasty
• Posterior approach total hip arthroplasty
• Robotic assisted total hip arthroplasty
• Hip replacement
SPORTS MEDICINE
GENERAL ORTHOPEDICS
ORTHOPEDIC TRAUMA AND FRACTURE CARE
About
Anthony P. Fiegen, MD is a fellowship-trained orthopedic sports medicine physician specialized in treating conditions of the shoulder, hip, and knee. In addition to a comprehensive sports medicine practice and joint preservation, he also performs joint replacement of the shoulder, hip, and knee.
Prior to joining Orthopedic Institute in 2024, Dr. Fiegen completed orthopedic surgery residency at Mayo Clinic in Rochester, MN. He then went on to complete a sports medicine fellowship at Wake Forest University in Winston-Salem, NC, where he served as a team physician for the ACC Wake Forest football, men’s basketball, and baseball teams. He served as a team physician for Winston-Salem State University football team and the Winston-Salem Dash, a minor league affiliate of the Chicago White Sox baseball organization. Dr. Fiegen is currently a reviewer for The American Journal of Sports Medicine (AJSM), and Current Reviews in Musculoskeletal Medicine.
Dr. Fiegen grew up in Madison, SD. He attended South Dakota State University competing for the Jackrabbits’ men’s basketball team from 2009-2013, winning the Summit League Tournament in his junior and senior seasons and advancing to the NCAA Tournament.
Dr. Fiegen is extremely excited to be returning to South Dakota with his wife and children to be close to family, friends, and to provide compassionate care to patients in the region with orthopedic problems.
Dustin P. Collins, MD
Specialties – Areas Of Focus
NON-OPERATIVE ORTHOPEDIC CARE INCLUDING:
• Regenerative Medicine, including Platelet-Rich Plasma (PRP) Injections
• Ankle Care
• Bone Stress Injuries
• Concussion Evaluation and Management
• Elbow Care
• Foot Care
• Fracture Care
• Hand Care
• Hip Care
• Knee Care
• Pediatric Care
• Scapular Dysfunction
• Shoulder Care
• Sports Injury Spine Care
• Wrist Care
PROCEDURES PERFORMED INCLUDE:
• Sports Diagnostic and Therapeutic Ultrasound – shoulder, elbow, wrist, knee, hip, and foot
• Tenex (percutaneous tenotomy) for tendinopathies of the hip, elbow and foot
• Ultrasound Guided Injections and Procedures:
• Platelet Rich Plasma (PRP)
• Intra-Articular Joint Steroid Injections
• Intra-Articular Hyaluronic Acid Injections
About
Whether you are an elite athlete, a weekend warrior, or someone that wants to stay as active and healthy as possible in your everyday life, Dr. Collins will take an individualized approach to attain your goals.
Dr. Collins is a fellowship-trained primary care sports medicine physician who evaluates, diagnoses and treats various sports medicine and musculoskeletal concerns. Dr. Collins uses sports ultrasound imaging and radiology to help assess and treat the underlying diagnosis in patients. He has experience with athletes of every age and level of competition, from Olympic athletes and Division I college athletes to professionals.
Dr. Collins grew up in Gilbert, AZ, with a passion for sports, particularly hockey. This passion culminated in the Tampa Bay Lightning choosing him in the 5th round (163rd overall) of the 2004 National Hockey League draft, earning him the distinction of being the 1st Arizona native drafted into the NHL. Dr. Collins’ hockey career took off in 2002 when he was part of the gold medal-winning United States National Team Development Program. He then attended Northern Michigan University in Marquette, MI, where he played Division I College hockey for four years. After college, he played five seasons of professional hockey across the AHL, ECHL, and CHL.
In 2014, he enrolled at Michigan State University College of Human Medicine in Lansing, MI, to earn his Doctor of Medicine degree. After completing his medical residency at the Mayo Clinic in Rochester, MN, he moved to Columbus, OH, where he completed his Sports Medicine Fellowship at The Ohio State University.
While at The Ohio State University, Dr. Collins served as an Associate Physician, where he had the opportunity to care for and manage medical illnesses and orthopedic injuries for NCAA Division I athletics, including; Men’s Football, Men’s & Women’s Ice Hockey, Women’s Field Hockey, Men’s Volleyball, Men’s and Women’s Soccer, Men’s and Women’s Lacrosse, Men’s and Women’s Track and Field, Men’s and Women’s Gymnastics, Men’s Baseball, and Women’s Softball. Additionally, he has provided medical care for the Columbus Clippers – the AAA affiliate of the Cleveland Guardians (MLB), the 2022 USA Women’s Olympic Ice Hockey team, various Big Ten tournaments, and the 2023 NCAA Men’s Basketball March Madness Tournament.
In 2023 USA Hockey selected Dr. Collins to join their Safety and Protective Equipment Committee (SPEC). Members serve as consultants to USA Hockey on all safety, injuries, and protective equipment matters. They continually study the game at all age and competition levels to develop means and methods of keeping the sport of ice hockey as safe and injury-free as possible for its participants, including making recommendations for changes in the playing rules.
When not seeing patients, Dr. Collins enjoys spending time with his wife, Samantha, and two children. During winter, you can find him planning and building a backyard ice hockey rink and coaching hockey. He also enjoys traveling, reading, being outdoors on the lake, golfing, hunting, fishing, and being an active volunteer and member of his local church and community.
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Luke H. Rasmussen, MD
Specialties – Areas Of Focus
HIP
• Total Hip Replacement – Minimally Invasive
• SuperPATH™️ Hip Replacement
• Revision Total Hip Replacement
• Hip Impingement
KNEE
• Surgical & Non-Surgical Knee Treatments
• Total Knee Replacement – Minimally Invasive and Robotic Knee Replacement
• Revision Total Knee Replacement
• Partial (Unicompartmental) Knee Replacement
ORTHOPEDIC TRAUMA AND FRACTURE CARE
About
Dr. Rasmussen is a fellowship-trained orthopedic surgeon specializing in total hip and knee replacements. He grew up in Mitchell, South Dakota, and completed medical school at USD Sanford School of Medicine. After residency at the University of Florida Jacksonville and a resident researcher appointment at Mayo Clinic in Jacksonville, he completed the Hedley Adult Reconstruction fellowship in Phoenix, AZ, at Abrazo Orthopedic Specialists.
Soft tissue preservation is critical in achieving rapid recovery after total joint replacement. For this reason, Dr. Rasmussen employs less invasive techniques during joint replacement, including the SuperPATH® tissue-sparing surgical approach for total hip replacement, the subvastus quadriceps-sparing approach for total knee replacement, and robotic-assisted surgery. These techniques may enable the patient to leave the hospital earlier without requiring the typical post-operative hip restrictions. Additionally, Dr. Rasmussen enjoys complex revision joint replacement, general orthopedics, and orthopedic trauma.
During his free time, Dr. Rasmussen enjoys spending time with his family and being outdoors. He enjoys sharing his love of hiking, biking, golfing, and skiing with his wife and two sons. In addition, Dr. Rasmussen and his wife love exploring the local food scene, and he always appreciates a good restaurant recommendation.
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Timothy L. Walker, MD
Specialties – Areas of Focus
KNEE
• Surgical and Non-Surgical Knee Treatments
• Total Knee Replacement – Minimally Invasive and Robotic Knee Replacement
• Advanced Knee Arthroscopy (Scope)
• Revision Total Knee Replacement
• Meniscus and Cartilage Repair
HIP
• Total Hip Replacement (Anterior Approach) – Minimally Invasive
• Revision Total Hip Replacement
SPORTS MEDICINE
GENERAL ORTHOPEDICS
ORTHOPEDIC TRAUMA AND FRACTURE CARE
About Dr. Walker
Since 2004, Dr. Timothy Walker has practiced orthopedics in Sioux Falls, specializing in total hip replacement, including anterior and standard approaches, total knee replacement, partial knee replacement, knee arthroscopy, and anterior approach total hip arthroplasty. In addition, he offers robotic-assisted total hip replacement and robotic-assisted partial knee replacement.
Born and raised in Indiana, Dr. Walker attended, and played football at Butler University, received a master’s degree from Purdue, and a doctorate from Indiana University. After medical school, Dr. Walker trained as a pediatric orthopedic research fellow at Indiana University and interned in general surgery at Indiana School of Medicine.
He performed his residency at Indiana University School of Medicine, is board-certified in orthopedics, and holds a subspecialty certificate in sports medicine.
When he is not working, Dr. Walker enjoys staying active by playing sports, running, hiking, weightlifting, and supporting his kids in their activities.
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Brent R. Thurness, MD
Specialties – Areas of Focus
NON-OPIOID, NON-SURGICAL, CHRONIC PAIN TREAMENTS
• Non-Surgical Back and Neck Pain Management
• Neuropathy
• Acute Pain
• Chronic Pain
• Epidural Injections
• Nerve Root Block
• Trigger Point Injection
• Interventional Spinal Injections
• Radiofrequency Ablation (Rhizotomy)
About Dr. Thurness
Dr. Brent Thurness specializes in treating neuropathy, joint, neck, and back-related pain. He provides interventional pain services for diagnostic and therapeutic purposes. In addition, he offers non-surgical musculoskeletal care to patients for whom surgery is not the best option or has failed to provide sufficient relief of symptoms.
Dr. Thurness attended medical school at the University of Iowa Carver College of Medicine in Iowa City, graduating in 1994 and completing his residency in anesthesiology at the University of Iowa Hospitals in Iowa City, IA.
Most recently, Dr. Thurness served as the Medical Director of the Anesthesia Department at Campbell County Hospital in Gillette, WY. As the medical director, he was an advocate for the department’s role in educating patients about the problem of opioid abuse and ways to prevent its spread with alternative pain management methods. As a result, he established a regional anesthesia program for post-op pain control. In addition, Dr. Thurness contributed to creating the same-day total joint program that helped over 75 patients in its first three months at Powder River Surgery Center in Gillette, WY.
Dr. Thurness and his wife Shelly have three (3) children. Cole and Chase played football and graduated from Chadron State College in Chadron, Nebraska in the Spring of 2022, and their daughter Emma will run track at college in the Fall of 2022.
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Corey P. Rothrock, MD
Specialties – Areas Of Focus
HIP
• Total Hip Replacement (Anterior Approach) – Minimally Invasive
• Revision Total Hip Replacement
KNEE
• Surgical & Non-Surgical Knee Treatments
• Total Knee Replacement – Minimally Invasive & Robotic Knee Replacement
• Revision Total Knee Replacement
GENERAL ORTHOPEDICS
ORTHOPEDIC TRAUMA AND FRACTURE CARE
About
Dr. Rothrock is a native of Clay Center, NE and joined Orthopedic Institute in 2009. Prior to that, his training took him across the United States. He completed his residency in Orlando, FL, where he gained extensive experience in care of the trauma patient, including operative experience with pelvic and acetabular surgery. He then moved to New York where he completed a year of subspecialty training in musculoskeletal oncology and he became an expert in limb salvage surgery and adept at tumor resection. He practiced in Louisville, KY before returning to the Midwest to be close to family.
Dr. Rothrock is an expert in hip and knee joint reconstruction and revision surgery, minimally invasive direct anterior hip replacement, pelvic and extremity trauma, and arthroscopic surgery. He was the first doctor in this region to introduce the anterior “from the front” hip replacement surgery to patients.
As a board certified orthopedic surgeon, Dr. Rothrock is adamant about not setting limitations for his patients. “The sky is the limit for what patients can do and accomplish after surgery. It is my duty and my passion to give every opportunity to make whatever their goals are a reality. That is why I continue to search for less invasive ways to perform surgery and speed recovery.”
When Dr. Rothrock isn’t taking care of his patients, he enjoys hunting, especially big game, and spending time with his family.
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Testimonials
