Karl Roberts, M.D.
Dr. Karl Roberts is a board-certified orthopaedic surgeon specializing in hip replacement, knee replacement, and complex revision joint surgery. With more than two decades of experience, he helps patients reduce pain, restore mobility, and return to daily activities with confidence. His care approach emphasizes thoughtful evaluation, clear communication, and treatment plans tailored to each patient's goals.
In addition to his clinical work, Dr. Roberts serves as program director for the Corewell Health/Michigan State University Orthopaedic Surgery Residency Program and as president of West Michigan Orthopaedics. He has contributed to national orthopaedic leadership, quality improvement, and clinical guideline development, and his research has been published in leading journals, including the Journal of Bone and Joint Surgery and the Journal of Arthroplasty.
Dr. Roberts enjoys spending time with his family, along with golfing, fitness, wilderness camping, visiting national parks, biking, basketball, and bluegrass music. He is also a dedicated Indiana University basketball fan.
Thomas S. Wenzlick, M.D.
Dr. Thomas Wenzlick is a board-certified, fellowship-trained orthopaedic surgeon specializing in hip replacement, knee replacement, and revision joint surgery. He works closely with patients to relieve pain, improve mobility, and restore quality of life through personalized treatment plans and advanced surgical care. His approach combines technical expertise with a strong commitment to patient education and support throughout recovery.
Dr. Wenzlick completed his orthopaedic surgery residency through Corewell Health/Michigan State University and fellowship training in adult reconstruction at Wake Forest Baptist Health. He also serves as a faculty member of the Corewell Health/Michigan State University Orthopaedic Surgery Residency Program. In addition to patient care, he has contributed to research and presentations on joint replacement outcomes, orthopaedic trauma, and evidence-based care.
Dr. Wenzlick enjoys following Michigan State athletics, traveling, hiking, camping, reading, running, and spending time with his family.
Carl Wierks, M.D.
Dr. Carl Wierks is a board-certified orthopaedic surgeon specializing in hip arthroscopy, direct anterior hip replacement, and the treatment of complex hip conditions. He cares for both active individuals and patients seeking relief from chronic hip pain, with a focus on accurate diagnosis, personalized treatment, and helping patients return to comfortable, active lifestyles.
Dr. Wierks completed medical school at Loyola University Stritch School of Medicine, residency at Johns Hopkins Hospital, and fellowship training in sports medicine at The Steadman Clinic in Vail, Colorado. He is widely recognized for his expertise in hip arthroscopy and has served as a consultant, educator, and course instructor in the field. He has also served as a physician for the U.S. Ski & Snowboard Team, bringing high-level experience in performance, recovery, and return-to-activity care.
Dr. Wierks enjoys spending time with his family, exercising, snowboarding, and boating.
Patrick Zietz, M.D.
Dr. Patrick Zietz is a board-certified orthopaedic surgeon specializing in sports medicine and the treatment of knee and shoulder injuries, including rotator cuff repair, ACL injuries, and reverse shoulder replacement. He helps patients return to activity safely and effectively through accurate diagnosis, individualized treatment, and a strong focus on long-term joint health.
Dr. Zietz completed his orthopaedic surgery residency through the Grand Rapids Orthopaedic Surgery Residency Program and went on to complete the Miami Sports Medicine Fellowship at Doctors Hospital in Miami. During fellowship, he cared for professional athletes, including the Miami Heat. He also serves as medical director of the Orthopaedic Residency Clinic and is committed to educating future physicians through his ongoing faculty and teaching roles. In addition to sports medicine care, he has experience managing workers' compensation cases and treating a wide range of knee and shoulder conditions for active adults and athletes alike.
Dr. Zietz enjoys hiking, fishing, and biking, and he is an avid University of Michigan football fan.
Kevin C. VanDokkumburg, P.A.
Kevin VanDokkumburg is a certified physician assistant specializing in orthopaedic care and sports-related injuries. He works with patients of all ages, from pediatric to older adults, to diagnose and treat a wide range of musculoskeletal conditions. His focus is on helping patients reduce pain, improve function, and return to their daily activities through personalized, patient-centered care.
Kevin has experience in both clinical and surgical settings, including assisting with open and arthroscopic procedures. He is skilled in joint and trigger point injections, musculoskeletal ultrasound, and imaging interpretation, allowing him to support accurate diagnosis and effective treatment planning. His approach emphasizes clear communication, patient education, and continuity of care throughout the recovery process. He earned his Master of Science in Physician Assistant Studies from Rush University Medical Center and holds a Bachelor of Arts in Exercise Science from Hope College. Kevin is certified in Basic Life Support through the American Heart Association and remains actively engaged in patient care within the West Michigan community.
Kevin is involved with Camp Sunshine, where he serves as part of the medical staff supporting individuals with cognitive and developmental disabilities.
What patients say about our physicians.
Schedule an Appointment →“Dr. Wenzlick did my hip replacement 6 weeks ago. He is very personable and explained the procedure so I could understand fully. I thank God for the expertise He has given him. Recovering well. I would recommend him anytime. Thank you.”
Larry D.“Great staff. Friendly, efficient and make you feel right at home followed by a visit with Dr. Roberts which was equally friendly and efficient. Dr. Roberts gets right to the point using language that any layman can understand and forthrightly tells you what can and cannot be done. A great office and a great doctor!!!!”
Gary S.“At West Michigan Orthopaedics, I respect the professionalism of Dr. Patrick Zietz to understand my symptoms and concerns of my knee injury. His willingness to listen and provide present and future direction for my personal situation I greatly appreciate. I'm recognized as a patient under his care and not just another number.”
Daniel P.“Dr. Carl Wierks performed a right hip THA in May 2017. The operation was a total success. Not only did the surgery relieve my hip pain, my lower pain was eliminated as well. My healing recuperation and recovery time were faster than expected and my functionality is remarkable. Dr. Wierks explained the operation procedures and recovery thoroughly and was very professional; as is the entire team at West Michigan Orthopaedics. I highly recommend Dr. Carl Wierks!”
Paul W.“I had a total hip replacement at the end of March. I wasn’t sure what to expect, but Dr. Wierks and PA Kevin answered everything I could think of. The surgery and after care were more than excellent. I’m so happy to have had it done, and to have had it done with them.”
Jan A.“Dr. Wierks and his team are incredible. Very knowledgeable, answered all my questions and concerns, front staff is very welcoming and Dr. Wierks did both my hip labrum tears within 2 years of each other. I wouldn't let anyone else touch my hips. So glad my PT suggested him and his team.”
Rachelle T.“Dr. Zietz was fantastic... very knowledgeable and personable. He did a great job with resolving my knee pain.”
Lisa J.“Awesome Dr. Zietz. Very personable and professional.”
Colene H.“I had two hip arthroscopies and two femoral osteoplasties done by Dr. Wierks. He did an amazing job, I am currently 8 months post second surgery and completely pain free and back to running. Both surgeries went great and I had no problems with rehab or recovery. Definitely 10/10 recommend.”
Ashleigh B.“Dr. Wierks performed my total hip replacement. The surgery went very well and recovery was quick and problem free. Dr. Wierks was professional, friendly, and answered all my questions thoroughly. The staff was very friendly and efficient. I highly recommend Dr. Wierks and all the staff at West Michigan Orthopaedics.”
Marji J.“Dr. Wierks is a wonderful surgeon and has done an excellent job for my hip pain. Dr Wierks offered several options for treatment for my pain. His office staff are very friendly and helpful!”
Lorrie H.“Dr. Carl did a great job and I enjoyed working with his staff.”
Chris M.