Setting the Optional Segments for the 837 Format
A secondary electronic file adds several new segments to the standard 837 format for primary claims.
These segments are added regardless of how the primary payment is posted:
- Service line payment information (2430 SVD)
 - Service line adjustment information (2430 CAS)
 - Service line adjudication date (2430 DTP*573)
 - Service line approved amount (2400 AMT*AAE)
 
These segments automatically create based on whether the file type is institutional or professional:
- Claim-level allowed amount (AMT*B6 – institutional only)
 - Claim-level payer amount paid (AMT*C4 – institutional, AMT*D-prof)
 - Claim-level patient paid amount (AMT*F5 –both)
 
Payer requirements dictate if other optional segments can be added. You can enable these optional segments with the electronic secondary claim options in the Payer master file.