Many primary care patients have behavioral health (BH) and substance use disorders (SUDs), yet Primary Care Physicians are inadequately trained in caring for these conditions. Project ECHO is a model of healthcare education for primary care providers (PCPs) to receive specialized knowledge and mentoring from addiction specialists about treating substance use disorders (SUDs). Project ECHO was developed in New Mexico to increase access to specialized care in rural and undeserved areas. Project ECHO aims to develop capacity to effectively treat common, complex diseases in rural and underserved areas. The ECHO model uses videoconferencing to simultaneously connect multiple PCPs with a team of academic specialists, and builds PCPs’ capacity via mentorship and case-based learning. Programs like Project ECHO will increase treatment capacity by using technology to rapidly bring information, knowledge and build clinical skills without having to spend excessive amounts to hire brand new staff or rent additional office space.