Vendor
Waystar
Clearinghouses & EDI networks. Requires REF*EI in loop 2010BB with tax ID for professional claims.
https://waystar.comSupported transactions
Per-transaction requirements
Transaction 837P
Details →ISA05/07 = ZZ/ZZ · GS01 = HC · GS08 = 005010X222A1
2 required · 0 fixed values