About Us

300 Main Street is a three storey heritage house set beautifully in Markham Village. It has a rich history as a health facility, dating back to 1911 when it was known as the Byer Cancer Hospital, one of the original hospitals in Markham. People had traveled from across North America to be treated with alternative medicine for skin cancer.

Since obtaining the building in 1998 and renovating the ground floor to accommodate his medical practice in a fashion safe for the chemically sensitive, Dr. Gannage has assembled a system of services with the intended purpose of improving patient outcomes. Dr. Gannage is proud of the building’s heritage, and of its continuing tradition.