Address:
20 Crown Steel Dr. Unit 6
Markham, ON
L3R 9X9

Give us a call: 
Phone: 289-846-5381 ext 224
Fax: 1-905-415-0071

Send us an e-mail:
ooa@secretariatcentral.com

PLEASE NOTE: The OOA cannot provide patients with the names of physicians providing care to patients. The Colleges of Physicians and Surgeons of Ontario maintains a website for patients to find a physician by specialty: https://doctors.cpso.on.ca/?search=general.