{
  "resourceType": "CodeSystem",
  "status": "draft",
  "content": "not-present",
  "name": "HrmSubClassCS",
  "id": "hrm-subclass",
  "title": "HRM Report SubClass CodeSystem",
  "description": "The sending facility's own report subclass, as it arrives in a Health Report Manager message.\nCarried on `DiagnosticReport.code` for the report and on `Observation.code` for the observations\nwithin it.\n\n**This specification does not define the values.** They are the sending facility's, they arrive in\nthe message, and nothing here constrains them or guarantees that two facilities mean the same thing\nby the same string. Read a subclass code together with the report's sending facility rather than on\nits own.\n\n**The same system is populated two different ways, and the codes are not interchangeable.** On\n`DiagnosticReport.code` the source subclass is split on the first `^`, so\n`HREC:CCO^CARDIAC CATH ONLY` becomes the code `HREC:CCO` with `CARDIAC CATH ONLY` as the display.\nOn `Observation.code` the accompanying subclass is carried whole and is never split. Equality\nacross the two places is not a safe test even when the underlying source strings agree.\n\n**Content is `not-present`.** There is no code list to publish -- membership is whatever sending\nfacilities emit -- so this declares the system's identity and defers its content rather than\npinning a snapshot. Bind extensible, and expect `code.text` to carry the human-readable form.\n\n**Nexus EMR writes this today at `http://services.well.com/fhir/CodeSystem/hrm-subclass`\n(FHIR-372)**: it is live in stored `code` codings and in code, and is under migration to the\ncanonical declared here. Write the canonical; expect both until the migration completes.",
  "url": "https://fhir.apps.health/CodeSystem/hrm-subclass",
  "experimental": false,
  "caseSensitive": true
}