This study will provide the opportunity to generate data on the long-term use of SUBLOCADE under real-world conditions, and to observe enduring changes in lifestyle, health, and sociodemographic factors that are part of the recovery process. Long-term patterns of abstinence/opioid misuse as well as measures of participants' physical, psychological, social, and economic well-being will be monitored to better understand factors associated with recovery from opioid use disorder (OUD). Therefore, this study will observe participants up to a maximum of 4 years.