Appointment Cancellations. Patients may cancel appointments by calling 727-585-3797 24 hours a day/7 days a week. For portal help, please email: patientportalsupport@dcmail.org or call 727-585-1859. Now offering Telehealth visits – Call 727-584-7706 to schedule. Convenient locations in Largo, Countryside, St. Petersburg, and Winter Haven..