UCLA is evaluating the California MAT Expansion Project to measure the impact of the state's response to the opioid overdose crisis. California's goals include increasing access to medications for addiction treatment (MAT), decreasing unmet substance use treatment need, and reducing opioid-related overdose death rates. Our evaluation integrates data from all of the state's projects, to create a central resource for information. Take a look at our latest data on the Evaluation Data Dashboard.