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We think Dr. Klaassen is the best! He is kind, takes his time when you go in. He doesn't treat you like a number, but like a friend. We would, and have recommended him to many of our family and friends. Thank you Dr. Klaassen. Keep up the good work.
- Mark & Pauline C.
Rebuilding your Wellness
Rebuilding your Wellness
Meet the Doctor
Mark A. Klaassen, M.D., F.A.C.S.
Orthopedic Surgeon Mark Klaassen learned early on what caring for others is all about. The son of missionaries, he grew up in Colombia where the positive impact of helping others was tightly woven into his character. This childhood experience made him fluent in Spanish. He returned home to the U.S. as a 15-year-old to continue his education, culminating in the MD degree he earned from the Indiana University School of Medicine at Notre Dame and the I.U. Medical Center. He completed his orthopedic surgery residency at Lutheran Hospital of Indiana and . . .
Dr. Klaassen’s Presentations
Dr. Klaassen has given hundreds of presentations on joint replacement and demonstrations of joint surgery in the United States and across the globe including the North, Central….
Making aDifference
Dr. Klaassen is presently involved in five clinical research studies, testing new innovative products and techniques in joint replacement. Studying advances in healthcare to increase….
Patient Reviews
The surgeon, Dr. Mark Klaassen, did a marvelous job on my partial knee (right). After 6 weeks what a positive difference in pain. Much less pain. The staff were terrific and very helpful as well as knowledgeable. OSMC is a fabulous place to have your knee surgery done. “All these medical people care about patients here”and all of them have PATIENCE with us ornery PATIENTS. Thank you Dr. Klaassen and thank you team!
"So far, so good."
"I know I can trust Dr. Klaassen and his team to make the best decisions for my health needs. This is the fourth replacement he has done for me and I am pleased with them all."
"I felt very comfortable asking the doctor anything especially of expectations afterwards."
"The further I went through recovery, the more I cane to appreciate the caring of the surgical staff"
"Dr. Klassen and Rosemary are very caring and helpful. Haven't had much experience with the rest of the team."
"When I had questions or concerns, they responded in timely fashion. Their answers were clear and concise to the questions I raised."
"Always willing to listen and to respond to questions."
"I felt the Dr. and the team worked together well to make sure I know what to expect, and and what was expected of me."
"Polite and encouraging."
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