The Complex Care Nurse ensures our High-Risk Patient population (primarily our Office Based Addiction Treatment (OBAT) program patients) are properly managed including, referrals, consults, tests, medication management, and patient education to ensure or move toward optimal wellness. • Ensures High Risk Patient population (Office Based Addiction Treatment (OBAT), Complex Care) is properly managed including, referrals, consults, tests, medication management, and patient education to ensure or move toward wellness.