Person healthcare-provider registry enumeration

The NPPES v2.1 API accepts NPI or person-name searches and returns NPI, enumeration type, active status, enumeration_date, last_updated, primary taxonomy and licence details, and practice location. Daily retrieval supports current registry evidence, but the response does not expose deactivation date for inactive records, a fixed registry edition, or an explicit query timestamp; name matches require independent disambiguation.

CMS's monthly deactivation file returns each deactivated NPI and NPPES Deactivation Date, with the report header supplying the snapshot as-of date. It establishes deactivation status and timing only; it does not include person identity, enumeration type, taxonomy, enumeration/update dates, match basis, or currently active provider records.