Hanson Diabetes Center | Your best source for Diabetes management and Education. 21216 Olean Blvd, Suite 6. Port Charlotte, FL 33952. Office: 941-624-4800. Clinical Trials: 941-764-9110. PATIENT PORTAL LOGIN. 2126 Olean Blvd, Suite 5. Port Charlotte, FL 33952. Phone: 941-624-4800..