{
  "tableNumber": "0257",
  "id": "v2-0257",
  "name": "NatureOfChallenge",
  "title": "natureOfChallenge",
  "description": "HL7-defined code system of concepts used to further describe an observation definition that is characterized as a challenge observation.  Used in HL7 Version 2.x messaging in the OM1 segment.",
  "url": "http://terminology.hl7.org/CodeSystem/v2-0257",
  "concepts": [
    {
      "code": "CFST",
      "display": "Fasting (no calorie intake) for the period specified in the time component of the term, e.g., 1H POST CFST"
    },
    {
      "code": "EXCZ",
      "display": "Exercise undertaken as challenge (can be quantified)"
    },
    {
      "code": "FFST",
      "display": "No fluid intake for the period specified in the time component of the term"
    }
  ]
}