{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "The surface of a tooth that is closest to the midline (middle) of the face.",
  "system" : "http://terminology.hl7.org/CodeSystem/FDI-surface",
  "property" : [ ],
  "codesystem" : "20b7385b-b6ca-5678-9b28-1c506e72b474",
  "concept_id" : "0c3bbd0c-e9d7-594e-a541-9bc39bf16ce9",
  "ancestors" : {
    "M" : 0
  },
  "id" : "b420830f-9971-4f44-9d91-5814e72bd15f",
  "code" : "M",
  "display" : "Mesial",
  "version" : "4.0.1"
}