Onyx Ranked #1 Overall in Black Book’s 2026 FHIR-Based Payer Interoperability & Electronic Prior Authorization Rankings

Research based on feedback from 764 qualified healthcare respondents ranks Onyx #1 overall and first in 11 of 18 key performance indicators.

FRISCO, TX, UNITED STATES, August 18, 2026 /EINPresswire.com/ — Onyx today announced it has been ranked the #1 overall FHIR-Based Payer Interoperability and Electronic Prior Authorization Solution in the 2026 Black Book™ Payer Interoperability & ePA Solutions Report, achieving the highest overall score among evaluated vendors.

Based on feedback from 764 qualified respondents representing health plans, Medicaid agencies, provider organizations, and payer technology teams, the report evaluated vendors across 18 key performance indicators spanning regulatory readiness, FHIR-based interoperability, clinical data quality, workflow integration, analytics, governance, developer experience, and operational performance.

Onyx earned the highest scores in 11 of the 18 evaluated performance categories, including CMS-0057 readiness and execution, Patient, Provider, and Payer-to-Payer API coverage, clinical data acquisition and normalization, workflow integration, provider activation, analytics and audit-ready reporting, AI-enabled clinical document intelligence, developer experience, security and governance, partner ecosystem, and standards roadmap.

“Health plans should not have to rebuild their data and technology foundation for every new mandate,” said Susheel Ladwa, CEO of Onyx. “Across the 55+ health plans we support, we are helping organizations connect healthcare data once and make it usable across the enterprise. That creates a stronger foundation not only for compliance, but also for improving outcomes, capturing appropriate revenue, reducing avoidable costs, and unlocking greater value from interoperability investments.”

The recognition comes at a pivotal time for the industry. While health plans continue to execute on CMS-0057, the next wave of interoperability requirements—including claims attachments, drug prior authorization, provider directory modernization, and digital quality reporting—will increasingly depend on the same underlying capabilities: connected data, identity and matching, workflow integration, governance, monitoring, and evidence.

Rather than deploying a new solution for every mandate, Onyx helps health plans build a reusable interoperability foundation that acquires, normalizes, and governs healthcare data once. That trusted foundation enables intelligence across digital quality, risk adjustment, care gap closure, payment integrity, and other critical payer priorities—improving outcomes, strengthening financial performance, and unlocking greater enterprise value.

Through OnyxOS, health plans move from fragmented interoperability projects to a scalable operating platform that supports compliance today while enabling intelligence across clinical, operational, and financial workflows.

Black Book’s rankings are based on validated current-user experience rather than vendor submissions, sponsorships, product demonstrations, or analyst opinion. Respondents were required to verify their organizations, roles, implementation status, production scope, and direct familiarity with the platforms evaluated.

The full Black Book 2026 Payer Interoperability & ePA Solutions Report is available here.

About Onyx
Onyx is a leader in healthcare interoperability and intelligence, combining deep payer industry expertise, FHIR leadership, and an active role in advancing the standards and implementation approaches that move healthcare data exchange forward. Through OnyxOS, Onyx helps health plans build the trusted data foundation required for compliance and transform connected healthcare data into intelligence that improves outcomes, strengthens financial performance, and unlocks greater value across critical payer priorities. Today, Onyx supports more than 55 health plans, including 25+ state Medicaid programs, through direct relationships and an extensive partner ecosystem, reaching more than one in six Americans. For more information, visit onyxhealth.io.

About Black Book
Black Book Market Research is an independent, vendor-agnostic healthcare technology research and benchmarking organization that provides comparative performance data to technology users, buyers, investors, analysts, and the media. Its payer interoperability research evaluates FHIR-based data exchange and electronic prior authorization solutions using validated customer and end-user experience rather than vendor submissions, sponsorships, paid participation or analyst opinion, and Black Book holds no financial interest in the companies included in its reports. https://www.blackbookmarketresearch.com

Kate Mosteller
Onyx Technology, LLC
+1 660-600-6111
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