TY - JOUR AU - H. Pham AU - C. Lin AU - D. B. Nguyen AU - L. J. Mooney AU - G. M. Le AU - S. J. Shoptaw AU - H. Van Truong AU - Y. I. Hser A1 - AB - Untreated co-occurring mental health disorders (MHD) and substance use disorders (SUD) are associated with negative treatment outcomes. This study explored the experiences and perspectives of patients with opioid use disorder (OUD) who were using methamphetamine while undergoing methadone maintenance treatment (MMT) regarding barriers and facilitators to accessing MHD services. We conducted 30 in-depth interviews with MMT participants with varying levels of MHD severity, assessed using the 21-item Depression, Anxiety, Stress Scale (DASS-21). Barriers to seeking MHD services included lack of awareness, fear of additional stigma and extra burden to families, unaddressed poly-substance use, and lack of specialized professionals. Benefits of integrating MHD services into MMT clinics included improved diagnosis, streamlined referrals, and reduced logistical challenges. Key facilitators identified included supportive family members, healthcare professionals, and digital platforms. Integrating MHD care into MMT, emphasizing family involvement, staff training, and digital platforms, holds promise to improve MHD diagnosis, referral, and treatment. AD - Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, University of California, 10911 Weyburn Avenue, Suite 200, Los Angeles, CA 90024, USA.; School of Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam.; VA Greater Los Angeles Healthcare System, Los Angeles, CA 90073, USA.; Department of Family Medicine, University of California, Los Angeles, CA 90024, USA. AN - 41551419 BT - Int J Ment Health Addict C5 - Opioids & Substance Use DA - Dec 19 DO - 10.1007/s11469-025-01616-w DP - NLM ET - 20251219 JF - Int J Ment Health Addict LA - eng N2 - Untreated co-occurring mental health disorders (MHD) and substance use disorders (SUD) are associated with negative treatment outcomes. This study explored the experiences and perspectives of patients with opioid use disorder (OUD) who were using methamphetamine while undergoing methadone maintenance treatment (MMT) regarding barriers and facilitators to accessing MHD services. We conducted 30 in-depth interviews with MMT participants with varying levels of MHD severity, assessed using the 21-item Depression, Anxiety, Stress Scale (DASS-21). Barriers to seeking MHD services included lack of awareness, fear of additional stigma and extra burden to families, unaddressed poly-substance use, and lack of specialized professionals. Benefits of integrating MHD services into MMT clinics included improved diagnosis, streamlined referrals, and reduced logistical challenges. Key facilitators identified included supportive family members, healthcare professionals, and digital platforms. Integrating MHD care into MMT, emphasizing family involvement, staff training, and digital platforms, holds promise to improve MHD diagnosis, referral, and treatment. PY - 2025 SN - 1557-1874 (Print); 1557-1874 ST - Mental Health Care for Patients with Opioid Use Disorder and Methamphetamine Use in Methadone Maintenance Treatment: Experiences and Perspectives T1 - Mental Health Care for Patients with Opioid Use Disorder and Methamphetamine Use in Methadone Maintenance Treatment: Experiences and Perspectives T2 - Int J Ment Health Addict TI - Mental Health Care for Patients with Opioid Use Disorder and Methamphetamine Use in Methadone Maintenance Treatment: Experiences and Perspectives U1 - Opioids & Substance Use U3 - 10.1007/s11469-025-01616-w VO - 1557-1874 (Print); 1557-1874 Y1 - 2025 ER -