See the patterns page for implementation and usage patterns.

The MedicationAdministration and MedicationNotAdministered profiles represent the positive and negative statements for a medication administration. To ensure instances retrieved meet positive intent, applications should check the status element as illustrated in this example:

define MedicationAdministrationNotDone:
  [MedicationAdministration] M
    where M.status = 'not-done'

The following example illustrates accessing MedicationAdministration not done data:

// connectathon/fhir4/cql/EXM108_FHIR4-8.2.000.cql
define "No Low Dose Unfractionated Heparin Administration":
  ["MedicationAdministration": medication in "Low Dose Unfractionated Heparin for VTE Prophylaxis"] VTEMedication
    where VTEMedication.status = 'not-done'

Examples

Both of these example instances meet measure intent for exclusion as defined in the following example CQL:

define "No VTE Prophylaxis Medication Administered or Ordered":
    ( ["MedicationAdministration": "Low Dose Unfractionated Heparin for VTE Prophylaxis"]
      union ["MedicationAdministration": "Low Molecular Weight Heparin for VTE Prophylaxis"]
      union ["MedicationAdministration": "Injectable Factor Xa Inhibitor for VTE Prophylaxis"]
      union ["MedicationAdministration": "Warfarin"]
      union ["MedicationAdministration": "Rivaroxaban for VTE Prophylaxis"]
    ) MedicationAdm
      let MedicationNotDoneTiming: Global.GetExtension ( MedicationAdm, 'qicore-recorded' ).value
      where MedicationAdm.status = 'not-done'
      return {
        id: MedicationAdm.id,
        MedicationStatusReason: MedicationAdm.statusReason,
        authoredOn: MedicationNotDoneTiming
      }

For a more complete discussion of representation of negation within QICore and quality improvement artifacts, see the Negation in QI Core topic.