Is the eligibility information available through eServices real time?

Published 01/06/2023

eServices uses the Centers for Medicare & Medicaid Services's (CMS's) HIPAA Eligibility Transaction System (HETS) 270/271 system, as required by the CMS, for all eligibility inquiries. Although eServices pulls data from HETS in real time, the data available in the HETS 270/271 system is only updated at certain times. The HETS 270/271 application data is updated once daily (early in the morning, Eastern Time). The HETS 271 response is not updated further during the course of a day. Trading partners should not resubmit the same transaction multiple times during the course of a day expecting to receive different results.

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