Our Team

Drs. Sams and Sullivan founded Decatur Orthopedic Center in 2013. Since then, they have added multiple providers in their effort to provide comprehensive musculoskeletal care. Decatur Orthopedic Center is your central Illinois destination for joint replacement, complex adult reconstruction, minimally invasive surgery of the shoulder, hip and knee, hand surgery and spine surgery. In addition to our orthopedic specialists, we have physical therapy on site with the latest in rehabilitative practices. Athletic Performance at DOC is an athletic optimization program designed to enhance athletic performance and minimize injury.

No matter your location, our team at DOC is ready to help you with your orthopedic needs. DOC provides orthopedic services at Decatur Memorial Hospital, St. Mary’s Hospital, Kirby Medical Center (Monticello, IL) and Pana Community Hospital.    

It is our mission to provide exceptional, compassionate care to our patients. Our goal is to provide the ultimate patient experience so that when patients leave our office, they will feel they were treated professionally with respect and individuality.

Jacob D. Sams, MD

Jacob D. Sams, MD

Dr. Jacob D. Sams is an Orthopedic Surgery Specialist serving Decatur, IL and surrounding areas. He graduated with honors from Southern Illinois University School Of Medicine in 2008.

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D. N. Sullivan, MD

D. N. Sullivan, MD

Dr. D. N. Sullivan is an Orthopedic Surgery Specialist serving Decatur, IL and surrounding areas. He graduated from Southern Illinois University School of Medicine in Springfield, IL.

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Daniel R. Lygrisse, DO

Daniel R. Lygrisse, DO

From very early in my training, I knew I wanted to be a hand surgeon. I fell in love with its precision, attention to symmetry as well as structure and function. My focus includes complex elbow, wrist and hand fractures, wrist and hand arthritis, small joint reconstruction, tendon repair and peripheral nerve surgery.

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Edward C. Elliott, DPM

Edward C. Elliott, DPM

Dr. Elliott graduated from Rosalind Franklin University of Medicine and Science and completed his residency at Carilion Clinic/Virginia Tech School of Medicine in Roanoke, VA. His foot and ankle special interests include trauma, sports medicine, ankle arthritis, and wound care.

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Christopher M. Graves, MD

Christopher M. Graves, MD

As a spine surgeon, Dr. Graves' interests include treatment of adult and pediatric spinal disorders including scoliosis, complex revision, trauma, and minimally invasive spine surgery.

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Kelsey M. Thacker, NP

Kelsey M. Thacker, NP

Kelsey was inspired to work in orthopedic surgery because of the opportunity to serve her community in a manner that she is passionate about. Her areas of interest include joint replacement and trauma.

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Holly Chapman, NP

Holly Chapman, NP

Holly received her undergraduate degree from Southern Illinois University Edwardsville. She worked as a Registered Nurse for 7 years and then went on to graduate from the University of Cincinnati with a Masters degree as a Women's Health Nurse Practitioner.

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Rachelle A. Parra, PT, CMTPT

Rachelle A. Parra, PT, CMTPT

Rachelle went to Bradley University for her Bachelor of Science in Physical Therapy. She has worked in all settings, but has found outpatient orthopedic rehabilitation to be her favorite.

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Nicole Floyd, PTA

Nicole Floyd, PTA

I doubled majored in Kinesiology at Southern Illinois University Carbondale and was a part of the Physical Therapy Assistant Program.

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Mark Putnam

Mark Putnam

Marks focus has been helping anyone and everyone discover how fitness can have a significant positive influence in all areas of life. Mark’s professional interests have evolved into helping young athletes build their athletic foundation.

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