Your facility has a need to setup an HL7 to HL7 interface and you run into brick walls with connectivity issues and data formats. This is not an uncommon situation because HL7 is not standard even within the same version, much alone across versions i.e. 2.3 to 2.5.1. The issues range from the data itself, the client sending physician custom ids, or the structure within the OBR segments. The format of HL7 segments vary and typically earlier or later versions are not compatible with one another. To add even more complexity to the situation, once the format issues are worked out, then both sides of the interface will need to agree upon the connectivity – TCP/IP port to port, SFTP, etc. HL7 to HL7 interfaces appear to be straightforward on the surface, but when the implementation process begins it becomes apparent there is much more complexity to them. For these reasons and more, it is highly recommended to engage an expert like Lifepoint Informatics to configure, develop and complete a successful HL7 interface project.