Medicare Claims Processing Manual (Pub. 100-04), Ch. 31 § 10.2
Eligibility Connectivity Workflow
10.2 -Eligibility Connectivity Workflow
(Rev. 10236, Issued: 07-31-2020, Effective: 08-31-2020, Implementation: 08-31-2020)
In 2005, the Centers for Medicare & Medicaid Services (CMS) implemented the HIPAA
Eligibility Transaction System (HETS 270/271) to address the standards for the Medicare
beneficiary eligibility inquiries, creating a centralized ASC X12 270/271 health care
eligibility inquiry application that can process eligibility transactions in real-time.
For information regarding HETS connectivity, visit the HETS Help web site.
http://www.cms.gov/Research-Statistics-Data-and-Systems/CMS-Information-
Technology/HETSHelp/index.html