Promoting Digital Health Excellence: The eRx Conformance Program

The reliable and timely exchange of electronic prescription information is foundational to modern healthcare delivery, yet national consistency in implementing the NCPDP SCRIPT standard has remained a challenge. Variations in vendor interpretation, limited validation resources, and evolving regulatory requirements have created barriers to the uniform adoption of these standards. Recognizing this, the Assistant Secretary for Technology Policy/Office of the National Coordinator for Health Information Technology (ASTP/ONC - https://www.healthit.gov) launched the eRx Conformance Initiative, a targeted effort to operationalize and sustain a centralized testing platform that enables developers, implementers, and certifiers to assess conformance against SCRIPT specifications with precision and confidence. As a critical enabler of interoperability and medication safety, this initiative aligns with ONC’s broader mission to advance trustworthy, standards-based health IT infrastructure at scale.

Fragmentation in Standards Implementation

Despite the widespread adoption of electronic prescribing, consistent adherence to the NCPDP SCRIPT standard across the health IT ecosystem has proven difficult. Vendors often interpret implementation guides differently, resulting in variations in how transactions are structured and exchanged. This lack of uniformity complicates testing and certification, introduces inefficiencies, and increases the risk of communication errors between prescribers, pharmacies, and payers. Additionally, updates to the standard, such as changes to data elements, workflows, or schema, require careful coordination across technical teams and certification bodies. Before the eRx Conformance Initiative, there was no single, authoritative platform for systematically validating SCRIPT-based transactions in a repeatable, policy-aligned way. This gap presented a risk not only to program integrity but also to ONC’s long-term goal of enabling interoperable, standards-driven care coordination.

Establishing a Standards-Aligned Testing Platform

To close the gap between standards development and real-world implementation, ONC initiated a multi-year contract to design, build, and operate a conformance testing system dedicated to electronic prescribing. The goal was to provide a reliable and scalable platform that enables health IT developers, certifiers, and federal stakeholders to assess and validate the structure and behavior of transactions against the NCPDP SCRIPT standard. The platform would serve as a central point of reference, supporting iterative updates to the standard, promoting national alignment, and ultimately accelerating vendor readiness for certification and production deployment. In selecting ASSYST to lead this effort, ONC prioritized proven capability in standards-based development, agile delivery, and secure system design, all essential for building a sustainable, production-grade solution that could evolve alongside regulatory and industry needs. CMS adopted the NCPDP SCRIPT standard for e-prescribing and electronic prior authorization (ePA). Under the CMS‑4205‑F2 rule (published July 17, 2024), Upgrades from SCRIPT version 2017071 to 2023011 are required by January 1, 2028. SCRIPT covers prescription orders, history, and ePA messaging.

Scalable, Agile-Driven Conformance System

ASSYST approached the eRx Conformance Initiative with a structured, agile delivery model tailored to federal health IT standards and policy oversight. At the core of the effort was the development and maintenance of a modular testing environment capable of validating electronic prescribing transactions by the NCPDP SCRIPT standard, version 2023. The system architecture supports iterative testing workflows across development, staging, and production environments, enabling controlled release cycles and rapid integration of feedback.

Over the course of the engagement, ASSYST developed and upgraded more than three dozen XML-based test scripts, covering a comprehensive range of eRx use cases, including new prescriptions, prior authorizations, renewals, cancellations, and clinical messaging. Each script was supported by a fully documented test case set, including test stories, data specifications, example messages, and expected results. These assets were mapped to acceptance criteria and tracked using integrated tools, such as JIRA and Confluence, providing transparency and traceability across all sprints.

The team also implemented continuous engagement with ONC’s technical leadership, reviewed and responded to user inquiries from the broader implementation community, and maintained rigorous compliance with federal IT quality standards by drawing practices from CMMI Level 3 and ISO 9001, 20000, and 27001 certifications.

Enabling Futureproof Standards-Based ePrescribing

The eRx Conformance Testing Platform has become a key asset in ONC’s broader strategy to drive interoperability and improve safety across the prescription drug ecosystem. By providing a centralized, standards-aligned environment for SCRIPT validation, the initiative enables health IT developers to test and refine their systems with greater speed, accuracy, and assurance long before they reach the certification or production stage.

This has led to measurable improvements in implementation consistency, reduced testing burden, and stronger alignment between policy goals and real-world technology behavior. The platform also provides federal stakeholders, including certification bodies and standards organizations, with a reliable tool to support compliance monitoring and future policy enforcement.

For the end user, whether a prescriber, pharmacy, or patient, the downstream impact is clearer communication, fewer transaction errors, and faster access to medication. By strengthening the technical foundation of e-prescribing, this initiative supports a safer and more coordinated healthcare experience for millions of Americans.