Mark Oyer, MD

Mark Oyer, MD

Welcome to OrthoIllinois!

I very much look forward to being able to provide your care and help you resume a more pain free and active life! I’d like to share a little background on how I came to be a total joint specialist and the focus of my practice.

I am a long-term Midwesterner, in fact my hometown is Tremont, Illinois, located southeast of Peoria in central Illinois. Growing up, I spent a lot of time working alongside my father, who was a carpenter by trade. I think my earliest influences for a medical career were piqued by my mother. As a nurse, she impressed upon me the difference medical care can make in people’s lives. I also learned the values derived from hard work by helping out on my grandfather’s farm.

As a youth, I also found time for competitive activities and was a three-sport athlete playing football, basketball and baseball. It was through playing sports and sustaining various injuries that required treatment procedures that I was first exposed to orthopedics. With a growing interest in how the body works and heals, I pursued my undergraduate degree in kinesiology from the University of Illinois at Urbana-Champaign as a recipient of two scholarships and graduating with Highest Honors on the Dean’s List.

I followed my undergraduate studies at the University Of Illinois College Of Medicine at Peoria where I earned my medical degree as a Graduate of Distinction. I remained in Illinois when I was accepted by Northwestern University, Feinberg School of Medicine Orthopedic Residency Program in Chicago where I completed both my internship and residency training.  I then gained additional advanced training by completing an Adult Reconstruction Hip and Knee Fellowship at the University of Wisconsin Madison School of Medicine and Public Health.

During residency, I developed my interest in the orthopedic sub-specialty of total joint replacement. Of all surgical fields, I believe total joint replacement provides the best results and most importantly, not only provides patients with pain relief, but gives them back the lifestyles they love. As a hip and knee surgeon, I find it an honor and a privilege to return patients’ trust by giving them back the ability to pursue an active life.

My practice is focused on anterior total hip replacements and robotic total knee replacements.

An anterior total hip replacement offers patients the ability to undergo a less invasive surgery and faster recovery. I perform a majority of them as outpatient surgery. My patients do not have restrictions after surgery. They are able to bend and cross their legs without having to worry about dislocation. Multiple studies have shown the benefits from an anterior total hip including decreased risk of dislocation over the lifetime of the hip replacement and faster recovery. I use the latest and greatest technology in the form of computer navigation. This allows me to know the components are in perfect position and the patient’s leg lengths are equal before we leave the operating room.

I have specialized training in offering robotic total knee replacement.  This surgery is performed with the robot assisting the surgeon to allow for a more precise knee replacement with less human error. My patients see a faster recovery than a standard total knee replacement. This surgery is often offered for patients to go home the same day. Given this is a newer and evolving technology, I also am one of the few robot instructors in the state of Illinois. Surgeons will often visit to learn the latest and greatest in total knee replacement.

When I am not treating patients, I enjoy playing with my chocolate Labrador, golfing, fishing, watching professional basketball, baseball, and football, and working out. My wife and I are serious foodies and enjoy just hanging out with friends and family.

Thank you for entrusting me with your care and I look forward to helping put an end to your hip and knee pain!

BACHELOR’S DEGREE University of Illinois Urbana-Champaign
MEDICAL DEGREE University of Illinois College of Medicine at Peoria
RESIDENCY Northwestern University, Feinberg School of Medicine, Chicago, IL
ADULT RECONSTRUCTION HIP & KNEE REPLACEMENT FELLOWSHIP University of Wisconsin Madison School of Medicine and Public Health

Insurance Questions?

Dr. Oyer and Ortho Illinois accept multiple insurance providers. To see a list of insurances accepted click here. Contact your insurance carrier for you specific plan details.


  • Board certified, American Board of Orthopaedic Surgeons

Hospital Affiliations

  • Ascension Saint Joseph – Elgin
  • Mercyhealth Javon Bea Hospital
  • Ortho Illinois Surgery Center
  • OSF Saint Anthony Medical Center
  • UW Health Northern Illinois / SwedishAmerican Hospital
  • Van Matre Encompass Health Rehabilitation Hospital