Mark Zissman, PsyD, CADC is a licensed clinical psychologist and certified alcohol and drug counselor. He is currently the Clinical Director of Gateway Foundation, Lake County Residential and Outpatient Services.  He has extensive experience in the treatment of Substance Use Disorders (SUDs) and co-occurring mental health conditions, in both adolescent and adult populations. Dr. Zissman is passionate about helping remove barriers that prevent people from safely accessing treatment and participating in the change process.