Opioid-related overdose deaths and incarceration rates have skyrocketed and have disproportionately affected women. Despite having a higher burden of substance use disorders and HIV/AIDS than criminal justice-involved (CJI) men, CJI women are less likely to have access to substance use and HIV treatment. This qualitative study will conduct in-depth interviews with CJI women, MAT providers, and criminal justice professionals to identify facilitators and barriers to illicit opioid use cessation and related issues among CJI women.