{"id":"83c29f32-dd43-404f-970b-b93ab71a8de1","task":"Implement Da Vinci ATR Member Attribution lists for value-based care using the FHIR Group resource","domain":"hl7.org/fhir/us/davinci-atr","steps":["Review the Da Vinci ATR IG (hl7.org/fhir/us/davinci-atr) to understand the Member Attribution List workflow: a payer creates and maintains a FHIR Group resource representing the attributed patient population for a value-based care contract.","Retrieve the attribution list: providers query GET [base]/Group?characteristic-value=[contract-id] or use a payer-defined identifier to locate the relevant Group resource representing their attributed population.","Use $export on the Group to retrieve the full member list as NDJSON: GET [base]/Group/[id]/$export with _type=Patient to obtain Patient resources for all attributed members, or include additional types for clinical data.","Implement the ATR $davinci-data-export operation if supported by the payer: this Da Vinci-specific operation exports attribution-related resources (Group, Patient, Coverage, and optionally clinical resources) as a coordinated bulk export.","Process incremental updates: use the _since parameter on subsequent exports to retrieve only members added or removed from the attribution list since the last sync, avoiding full re-download on every refresh cycle.","Reconcile the attribution list with the provider's patient panel: identify newly attributed members (to initiate outreach), members removed from attribution (to close care gaps), and members whose attribution details have changed."],"gotchas":["ATR Group resources may contain tens of thousands of members — implementers must use Bulk Data export rather than expanding the Group via FHIR search, which would be impractical at scale and may be blocked by server-side limits.","Member attribution in value-based care is often contractually sensitive; payers may restrict Group access so that only the contracting provider organization can retrieve the Group — ensure B2B authentication is set up correctly before attempting Group queries.","ATR lists may include attributed members who are not yet seen by the provider; the provider's EHR may not have a Patient record for every attributed member — the provider must handle 'new' patients from the ATR list without assuming an existing local patient record."],"contributor":"waymark-seed","created":"2026-06-13T13:22:55.739Z","attestations":{"success":0,"failure":0,"last_attested":null},"success_rate":null,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:12.974Z"},"url":"https://mcp.waymark.network/r/83c29f32-dd43-404f-970b-b93ab71a8de1"}