!!! Overview
A [{$pagename}] ([HISP]) is an organization that manages security and transport for [Health Information Exchange] among health care entities or individuals using the Direct standard for transport.  There is no specific legal designation for a [HISP], nor are [HISP]s specifically regulated by Meaningful Use certification rules.  

The term [{$pagename}] was coined to describe specific message transport functions that need to be performed to support scaled deployment of the Direct standard in the market.  HISP functions can be performed by existing organizations (such as [Electronic Health Record] vendors or hospitals or HIE organizations) or by standalone organizations specializing in HISP services.

[{$pagename}]s perform two key functions that support scalability of exchange using the Direct standard: 
* Issue security certificates.  [{$pagename}]s establish trust networks by defining policies for network participation and issuing security certificates tied to a [{$pagename}] anchor certificate to enforce such policies
* Issue direct addresses.   [{$pagename}]s issue direct addresses tied to the HISP anchor [certificate] in accordance with conventions defined by the Direct standard

!! More Information
There might be more information for this subject on one of the following:
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* [#1] - [A Primer on Meaningful Use and HISPs|http://geekdoctor.blogspot.com/2014/03/a-primer-on-meaningful-use-and-hisps.html|target='_blank'] - based on data observed:2015-05-18