Beware an error in grouper logic in the latest PPS grouper software. "The error … is related to the transition to support an XML format," CMS says on its website.
A new grouper file "is required for those integrating the HH-PPS into long running applications that require XML record format processing whether the integration is through the Bridge DLL or conversion to a .NET DLL," CMS explains. "This update is not required for those who use the command line version or who use the Java source as a model for their own HH-PPS development."
Download the new grouper at www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/HomeHealthPPS/CaseMixGrouperSoftware.html — scroll down to the "Downloads" box.