861 Health Park Blvd. Grand Blanc MI 48439       
                                Phone: 810- 953-0500
                                 Fax: 810-953-0031
Meet our Surgeons  
ALL OF OUR DOCTORS ARE BOARD CERTIFIED!
Dr. Tien M.D. grew up in East Lansing and attended the University of Michigan Medical School. In addition to his work at Greater Michigan Orthopedics, he also maintains a practice in Jackson, Michigan.

Dr. Heming D.O. completed an Internship at Genesys Regional Medical Center. He served in the Navy for four years, and was the Medical Director for Sports Medicine and Rehabilitative Therapy at the Great Lakes Naval Base. 
Dr. Marquart did his fellowship at Michigan Foot and Ankle International in Pontiac, Michigan. His orthopedic surgery residency was completed at Genesys Regional Medical Center in Grand Blanc, Michigan where he was chief resident. 
Dr. Sandrock D.O. graduated from the University of Osteopathic Medicine and Health Sciences in Des Moines, Iowa. After serving four years with the United States Air Force, he completed his Orthopedic Surgery Residency at Flint Osteopathic Hospital. 
Dr. Fallahi M.D. completed his undergraduate work at the University of Michigan – Ann Arbor and received his Doctor of Medicine degree with honors from Wayne State University. He is Board Certified in Orthopedic Surgery and fellowship-trained. 
Dr. Ryan Nelson D.O. is a Flushing native. He graduated from the University of Michigan, the Midwestern University in Chicago, IL, and did his Residency at Genesys. Dr. Nelson completed a fellowship at New England Baptist Hospital.
Meet our Clarkston Doctors 
Dr. Sardelli has always been passionate about helping people. This factor, combined with his love of sports and science made a career in orthopaedic Surgery a natural choice. 
Evan J. Kohler MD is a fellowship trained orthopedic surgeon specializing in adult hip and knee reconstruction. He was raised in Commerce Township, Michigan and attended Walled Lake Northern 
High School. 
Dr. Zavinsky My area of expertise, foot and ankle surgery with an expressed interest in trauma, sports medicine and progressive foot deformities. Whether patients suffer from a chronic condition, dealing with sports related injury, or been involved in an accident, my patients expect to receive personalized care.
Ashley Rose, PA-C, is a dedicated Certified Physician Assistant specializing in Orthopedics. A graduate of the University of Detroit Mercy's 5-Year Accelerated Physician Assistant Program, Ashley brings a wealth of knowledge and 
expertise to her role. 
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