Todd Byerly (healthgrades) I have had this man replace one knee, and rebuild both ankles with all the screws etc. in the last year and I love this guy and his staff!!! He is going to replace the other knee in a few months. Would trust this guy and his staff with my life. I cannot complain about one thing and for me that is something!
Jason (healthgrades) I had severed my Achilles tendon playing basketball. He chose not to do surgery with a new treatment that the tendon will fuse itself back together with proper care. I was running on a treadmill within 2 months. He was very professional and remained focused on my well being.
Debbie Duckworth (vitals) I had a surgical procedure done in late September. My treatment is ongoing, and it is a slow recovery process (I knew this ahead of time). I have no complaints about anything associated with my care and treatment. All staff treat me with great respect and are genuinely helping me through this process. Dr. Mulshine is never in a hurry during my visits, he allows me plenty of time for questions or concerns. I have and will continue to refer to this practice.

Marissa Mahan, FNP

Primary Specialty

General Orthopedics


Phone (217)-547-9100


“As a nurse practitioner in orthopedics, I enjoy taking care of patients with a variety of different orthopedic conditions. It is fulfilling to help patients identify what is causing their discomfort, provide treatment options and get them back to doing what they love!”

Additional Info
  • Bachelors in Nursing from St. John’s College of Nursing, Springfield, IL
  • Doctorate in Nursing Practice: Family Nurse Practitioner from Southern Illinois University Edwardsville, Edwardsville, IL
  • Certified by the American Nurses Credentialing Center
  • Member of the American Association of Nurse Practitioners
  • Member of the American Nurses Association