title: What hl7 version is required for meaningful use 3?
body: <p>I am working on an EHR application and it has already implemented some version of HL7. We are going to certify this EHR for Meaningful use 3 (mu3). </p>
  
  <p>Any idea what version of HL7 will be required for meaningful use 3 (mu3) certification?</p>
  
  <p>I have worked on edi before, never worked in hl7, any suggestions will be appreciated.</p>