The purpose of this Funding Opportunity Announcement (FOA) is to accelerate the development of Digital Therapeutics (DTx) to treat Substance Use Disorders (SUDs). Advances in technology offer unprecedented opportunities to develop clinical-grade mobile, web, or other software-based platforms designed to deliver treatments that are safe and effective for SUD. FDA authorization of DTx can play an important role in increasing the availability of treatments to patients with SUD, although there are other pathways for d...