Diagnostic Clinic. Patients may cancel appointments by calling 727-585-3797 24 hours a day/7 days a week; For portal help, please email: [email protected] or call 727-585-1859 Now offering Telehealth visits - Call 727-584-7706 to schedule. Dc-fl.com DA: 13 PA: 13 MOZ Rank: 29 DA: 13 PA: 13 MOZ Rank: 29.