Vendor
VA Community Care Network (Optum)
Payers. TPA: Optum (Regions 1-3) and TriWest (Regions 4-5). Route claims via Optum VACCN clearinghouse.
https://www.va.gov/communitycare/Supported transactions
Per-transaction requirements
Transaction 837P
Details →ISA05/07 = ZZ/ZZ · GS01 = HC · GS08 = 005010X222A1
1 required · 0 fixed values