Autism Treatment Services (920) 907-3928 For fastest response, please call between 8 a.m. and 5 p.m. Request Appointment Locations Treffert Center 371 E. First Street Fond du Lac, WI 54935 United States Services Autism Treatment Services (ABBA)(920) 907-3928 Treffert Center(920) 907-3967 Patient Testimonials Related Blogs What is a sensory diet? November 15, 2017 Help for Families Affected by Autism July 14, 2017 Our senses and sensory processing April 7, 2017 The little black doctor’s bag February 24, 2017