Many treatments and procedures can be performed in the office; those that cannot (mostly surgeries) will be scheduled either at the hospital or the Wausau Surgery Center. After considering many factors, the physician will discuss which option is best for you. Departments All audiology testing and services are performed by Clinical Doctors of Audiology (hearing tests, hearing aids and loss of balance). Comprehensive Allergy and Immunological care (testing, diagnosis and treatment) for Pediatric and Adult patients. 1-800-897-3307 © ENT Associates 2801 Westhill Drive Wausau, WI 54401 (715) 847-2021 Caring for North Central Wisconsin for over 40 years.