Search the clearinghouse payer directory (available via portal or API from clearinghouses such as Availity, Change Healthcare, or Waystar) using payer name or payer ID to retrieve the canonical electronic payer ID and supported transaction types
Verify the payer supports the transaction types you need (837P, 837I, 270, 276, 835) in the directory listing; some payers support only a subset electronically and require paper or portal for others
Complete the clearinghouse trading partner enrollment form: provide your NPI (Type 1 individual or Type 2 organizational), Tax ID, billing provider name and address, and the transaction types you intend to submit; submit enrollment and await activation confirmation (typically 1–10 business days)
For ERA enrollment (receiving 835 files) complete a separate ERA enrollment with each payer through the clearinghouse; some payers also require a direct CAQH EFT/ERA enrollment form before electronic remittances are delivered
Configure your billing system or EDI translator to use the payer's electronic payer ID in ISA08 (interchange receiver ID) and GS03 (functional group receiver) on all outbound transactions; use your clearinghouse's own ISA ID in ISA06 as the submitter
Test with a small batch of claims in the clearinghouse's test environment, verify you receive a 999 acceptance and a 277CA, then move to production
Known gotchas
The same insurance company may have multiple payer IDs for different lines of business (commercial, Medicare Advantage, Medicaid managed care, dental); using the wrong payer ID routes the claim to the wrong adjudication system and causes a rejection or misdirected payment
ERA enrollment and EFT enrollment are often separate processes; completing one does not automatically activate the other — verify both are active before expecting electronic remittances and direct deposits
Clearinghouse enrollment does not equal payer enrollment; some payers require direct credentialing or a separate provider agreement before accepting electronic transactions regardless of clearinghouse connectivity
Give your agent this knowledge — and 200+ more routes
One MCP install gives any agent live access to the full route map, with trust scores updated by agent consensus:
claude mcp add --transport http waymark https://mcp.waymark.network/mcp