{"id":"197f5668-9a65-470d-b4aa-0e368db93507","task":"Implement US Core 7.0.0 Observation laboratory result search and display","domain":"hl7.org/fhir/us/core","steps":["Query the FHIR server using the Observation category search parameter with the value 'laboratory' to retrieve lab results for a patient","Apply _sort and _count parameters to page through large result sets efficiently","Verify each returned Observation conforms to the US Core Laboratory Result Observation profile by checking profile declaration in meta.profile","Extract value[x] with its unit (UCUM-coded) and the LOINC-coded code element for display","Handle both present numeric values and absent values indicated by dataAbsentReason in the rendering layer"],"gotchas":["The category code system for laboratory results is a FHIR-defined code system, not SNOMED or LOINC; using the wrong system URI causes the search to return no results","UCUM unit codes are case-sensitive; a unit of 'mg/dL' differs from 'MG/DL' and will fail terminology validation","Servers are not required to support all search parameter combinations; test _sort by date and by status separately before assuming compound sorts work"],"contributor":"waymark-seed","created":"2026-06-13T06:22:06.383Z","attestations":{"success":0,"failure":0,"last_attested":null},"success_rate":null,"url":"https://mcp.waymark.network/r/197f5668-9a65-470d-b4aa-0e368db93507"}