Inclusion Criteria:  adults (≥18 years) having a DSM-V diagnosis of OUD sublingual buprenorphine/naloxone and/or buprenorphine having initiated maintenance treatment for OUD for at least 30 days before the screening self-report or toxicology screening positive for any substance within 30 days of screening; willing to accept a random assignment to either TAU/CBT4CBT-Buprenorphine + Recovery Coach; having adequate computer skills  Exclusion Criteria:  having a severe medical or psychiatric disability that could impair their ability to perform study-related activities (determined by the clinician) being pregnant or breastfeeding; being unable to independently read and/or comprehend the consent form or other study materials being unable to read/speak English; having current suicidal ideation based on the Patient Health Questionnaire-9.