Construct the ISA/GS envelope and 270 transaction set using the 005010X279A1 implementation guide, populating the HL subscriber loop with the member ID, date of service, and service type code
Send the formatted X12 payload to the payer clearinghouse endpoint over AS2 or SFTP, or via a real-time API wrapper that accepts the raw 270 string
Receive the 271 response and split segments by the tilde (~) delimiter, then loop through EB segments to extract benefit information such as coverage active/inactive, copay, deductible, and out-of-pocket amounts
Map EB01 (eligibility/benefit information) codes—e.g., '1' for active coverage, '6' for deductible—along with EB03 service type codes and EB06 monetary amounts to your internal data model
Handle AAA rejection segments indicating the inquiry could not be processed, logging the reject reason code and surfacing it to the calling workflow
Known gotchas
005010 remains the HIPAA-mandated version as of 2026; payer companion guides vary widely and may restrict which service type codes are accepted in real-time versus batch mode
Member ID format mismatches (leading zeros, suffixes) are the most common cause of AAA rejections; normalize the ID against the payer's companion guide before sending
Real-time 271 responses may return 'unable to respond at current time' rather than actual benefit data during payer maintenance windows—implement a retry with exponential backoff
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