Los Angeles Center on Alcohol and Drug Abuse (L.A. CADA)'s Medication Assisted Treatment Program (MAT) seeks to expand and enhance access to MAT for uninsured and underinsured adults with an opioid use disorder in Los Angeles' Service Planning Area 7. Key objectives include: 1. Increasing accessing to MAT through enhanced collaborations, 2. Developing outreach strategies to increase participation in and access to MAT, 3. Engaging 90% of MAT patients in case management, 4. Conduct 3, 6, and 12 month follow ups, and 5. Provide recovery support services.