How do i contact coto? Please contact us at [email protected] or 1-800-890-6570 or check the directory below for specific information. The College is only able to accept mail delivered by Canada Post at this time. No in-person deliveries can be accommodated until further notice.What does coto do for you? The College of Occupational Therapists of Ontario (COTO) is the regulatory organization that oversees the practice of occupational therapists (OTs) in Ontario. Our job is to make sure you receive safe, effective care from OTs.Who is humberto coto? Humberto Coto, MD is a board-certified interventional cardiologist with nearly 40 years of experience. Dr. Coto has extensive training and expertise in non-invasive and invasive cardiology, preventive cardiac care, and risk factor identification.