The Health Insurance Portability and Accountability Act of 1996 (HIPAA) mandated health care EDI implementation guides. Information on HIPAA and the HIPAA EDI implementation guides can be found at the following links.

HIPAA Information: http://cms.hhs.gov/hipaa/hipaa1/default.asp
HIPAA EDI Implementation Guides: http://www.wpc-edi.com/hipaa