Entrance for Patient Portal where existing patients can request an appointment or refill, view medical records, send messages to clinical staff, review lab results or receive reminders. ... The Allergy, Asthma & Sinus Center. 801 Weisgarber Road • Suite 200. Knoxville, TN 37909. P. 865-584-0962 • 1-866-231-0701. F. 865-584-6384. HIPAA ....