A hotfix is available for Microsoft BizTalk Server 2013, Microsoft BizTalk Server 2010, and Microsoft BizTalk Server 2009.This hotfix enables support for Health Insurance Exchange (HIX) EDI transactions 005010x306 (820) and 005010x220 (834). This hotfix includes HIPAA 5010 compliant schemas that you can build and deploy in your BizTalk Electronic Data Interchange (EDI) application.
An older version of the transaction 820 schema was previously included with BizTalk Server. Therefore, this hotfix has the same doctype as the existing transaction 820 schema. The new and old transaction 820 schemas cannot coexist in a BizTalk deployment . If both of the transaction 820 schemas have to be used in a BizTalk deployment, you must change the namespace of the new schema so that both schemas can be uniquely identified and used in the BizTalk application. In this case, the new schema has to be treated as a custom schema.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.