The National Electronic Information Corporation, formerly one of largest processors for electronic healthcare transactions in the U.S., which was acquired by Envoy Corp. in 1996 as Envoy-NEIC,[1] acquired by Healtheon/WebMD in May 2000 as WebMD-Envoy, renamed to WebMD Business Services in early 2005, and renamed again later in 2005 to Emdeon Business Services.