In Massachusetts, we do not want facilities to send patient name in their syndromic surveillance data. Here's what I communicate to data providers when this issue comes up:
PID 5, patient name, is missing. This is a confusing error - it comes up because, while we don't want you to send patient name for syndromic surveillance, HL7 requires it.
From the PHIN Guide:
Patient Name: If Patient Name is known, but not desired to be sent, then the second occurrence of PID-5 is valued and only PID-5.7 (Name Type Code) is valued with the constant value "S" | ~^^^^^^S|