Can extra support keep people with opioid addiction in treatment longer?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Eligibility/Inclusion Criteria. For Aim 3, criteria we seek to recruit include: * Patient participants 18 years and older * Have an OUD-related diagnosis (e.g. Opioid Use Disorder in remission, Opioid Dependence, Opioid Abuse, Substance Use Disorder - opioids, etc.), or have used fentanyl or heroin over the past 30 days * Who meet at least one of the following criteria: * Present to primary care at Central City Concern (CCC) within 8 weeks of starting or re-starting a treatment episode (defined as starting MOUD after not having received prescribed MOUD in an outpatient setting for OUD in the prior 30 days). * Who present to primary care at CCC and are not seeking treatment with MOUD and have not engaged in counseling services (e.g. harm reduction counseling) in the prior 30 days * Have been receiving MOUD in prior 30 days but had a return to use (used fentanyl or heroin) within the past 30 days * Medical complexity (e.g. self-reported or verified in patient's electronic health record) * Have access to phone and/or computer for follow-up activities * Desire to engage in counseling and/or peer services Exclusion Criteria: * Patient participants who present for addiction treatment but are ineligible to receive on-going services at Central City (i.e. they have existing primary care at another location, or are currently receiving opioid use disorder treatment at another clinic, such as methadone clinic) may not participate in the study. * Patient participants who are not able to verbally consent may not participate in the study. * Patients who do not have addiction to opioids may not participate in the study. * Patients who participated in Aim 2 would not be eligible for Aim 3 * Patients who lack stable phone access may not participate in the study.