Cornerstone Physiotherapy in Markham & Unionville. You are in the right place. Cornerstone has been helping people live pain free since 2008 and we are excited to serve the Unionville and Markham communities at our state-of-the-art clinic on Hwy 7 at McCowan across from Markville Mall. We will help you heal completely and return to the activities you love. Cornerstone’s clinicians are at the top of their field, so you can rest assured that we have the skill and experience you need. Our customer service team will go the extra mile to make your recovery as smooth as possible so you can focus on getting better. We provide one-on-one treatment in a beautiful private setting to eliminate injury, prevent future complications and help you live your best life. Take the first step in your recovery now. Give us a call. more... See more text