This study is stage 2, round 1 of a larger study which refines and optimizes the EMBED clinical decision support (CDS); see NCT03658642 to increase number of ED physicians following standard of care for the administration of buprenorphine to appropriate patients with opioid use disorder.

This study is stage 2, rapid response testing (RRT), of the optimization phase of a larger study which refines and optimizes the EMBED* clinical decision support (CDS); see NCT03658642 to increase number of ED physicians following standard of care for the administration of buprenorphine to appropriate patients with opioid use disorder. Investigators will use a Multiphase Optimization Strategy (MOST) framework study with preparation, optimization, and confirmatory phases.

In stage 2 optimization phase, investigators will conduct serial rapid-cycle randomized testing to inform iterative refinement of the CDS interface and workflow to minimize user errors, task disruption, and abandonment through identification of specific targets for improvement via application of novel CDS outcome measures with the goal of improving CDS usability.

Five rounds of A-B testing are expected. The more successful condition will be tested in the subsequent round against a novel test condition. In this first round we will test the placement of the nurse prompt to complete COWS randomizing encounters to place the prompt under either required or optional documentation. Future rounds will be planned, with arms and interventions added, as the project progresses in order to build on insights gained in each round.

Phase 3, the evaluation phase, will consist of a randomized trial of the optimized package compared to the original EMBED and the evaluation phase in which investigators will compare the efficacy of the optimized, multicomponent CDS package to the original EMBED CDS on ED-initiation of buprenorphine rates in patients with OUD in a randomized trial.

*EMBED is a user centered, clinician facing clinical decision support system integrated into the electronic health record workflow to facilitate initiating buprenorphine in the emergency department by: diagnosing opioid use disorder with a checklist based on the diagnostic criteria of the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, fifth edition), assessing the severity of withdrawal with the Clinical Opioid Withdrawal Scale (COWS), motivating patients to accept treatment with a scripted brief negotiation interview, and automating the electronic health record workflow, including clinical and after visit documentation, order entry, prescribing, and referral for ongoing treatment in the community

This study does not have open enrollment.

Inclusion Criteria:

• Emergency department patient
• 18 years of age or older
• Moderate to severe opioid use disorder

Exclusion Criteria:

• Under 18 years of age
• Pregnant
• Currently receiving medication for opioid use disorder

De-identified data related to EHR use measurements in various levels of aggregation. e.g., time spent on the CDS or threshold outcomes such as dismissal of the CDS without action under a specific amount of time or the time spent on CDS that exceeds what was expected based on the patient's clinical opioid withdrawal (COWS) score, time in the ED, or level of acuity, patient acuity, chief complaints or diagnoses, clinician, interruptions (such as orders started but not finished), task switching, seasonality, and variation in shift timing (such as nights and weekends). Data shared will include variables relating to patient demographics, medical history, prescription information, clinician facing clinical decision support (CDS) firing and clinician action information, and clinician prescribing decisions and historical prescribing.

De-identified data will be shared with NAHDAP as soon as possible upon completion of quality control procedures, analysis, and at the time of associated publication or end of performance period. Data will be released by NAHDAP at the time of receipt and will be available indefinitely.

De-identified data sets used for analysis will be submitted to NAHDAP through the NIH HEAL Initiative and will be available for public use according to NAHDAP data sharing policies and restrictions set by our DUA with NAHDAP and our IRB. All data submissions to NAHDAP undergo confidentiality review to protect respondents' data from being re-identified.

Portions of the ADAPT intervention will be built for national distribution on the Epic EHR platform. Distribution of code that is proprietary to Epic may limit distribution of certain portions of software or code. In this situation, investigators will provide dashboards and visualizations of workflow diagrams as appropriate to disclose interface and workflow concepts to the broader scientific community These portions of the data will also be subject to restricted use access outside of organizations using Epic.