As a provider, do you wonder how often eligibility information is updated in HETS? The eServices application is required to use CMS’ HETS 270/271 system 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. CMS currently pulls the updated data Tuesday through Saturday during the hours of 6 p.m. and 8 p.m. This data is then uploaded into HETS during the hours of 9 p.m. to 6 a.m. As soon as updated data is available in the HETS 270/271 system, providers will be able to view it in eServices.