Advanced Therapy Group

John "Wren" Chellis, DPT

Wren is a licensed physical therapist and completed his Doctorate in Physical Therapy in 2012 at the University of Michigan-Flint. He has gone on to complete advanced training in the spine, manual therapy, functional biomechanics, sports medicine, ASTYM, functional training, headaches, and massage. Wren is also Certified in Professional Bike Fitting and Functional Capacity Evaluations (FCE's).  When away from the clinic he enjoys spending time with family and friends, playing sports, and being outdoors.


Please use the form to request an appointment at our facility. Same day appointments available.

Advanced Therapy Group is a premier practice that provides patients with the highest quality care. We are located 
conveniently in Traverse City, MI on Garfield Avenue.