NPPES remains the authoritative source for MIPS, cost attribution, and ACO enrollment today and shouldn't be replaced. The new CMS National Provider Directory (NPD) is a FHIR-based API layer that adds what NPPES can't explicit provider-organization affiliations, near real-time updates, and digital endpoints. For Healthmonix and Prism, the play is to keep NPPES operational while ingesting NPD alongside it, unlocking a "Provider Network Intelligence" layer.
