<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="reaction-event-certainty" />
  <text>
    <status value="generated" />
    <div xmlns="http://www.w3.org/1999/xhtml">
      <p>The narrative has been removed to reduce the size of the distribution of the Hl7.Fhir.Specification library</p>
    </div>
  </text>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-ballot-status">
    <valueString value="Informative" />
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="0" />
  </extension>
  <url value="http://hl7.org/fhir/reaction-event-certainty" />
  <identifier>
    <system value="urn:ietf:rfc:3986" />
    <value value="urn:oid:2.16.840.1.113883.4.642.1.860" />
  </identifier>
  <version value="3.0.0" />
  <name value="AllergyIntoleranceCertainty" />
  <status value="draft" />
  <experimental value="false" />
  <date value="2017-04-03T11:27:53+00:00" />
  <publisher value="HL7 (FHIR Project)" />
  <contact>
    <telecom>
      <system value="url" />
      <value value="http://hl7.org/fhir" />
    </telecom>
    <telecom>
      <system value="email" />
      <value value="fhir@lists.hl7.org" />
    </telecom>
  </contact>
  <description value="Statement about the degree of clinical certainty that a specific substance was the cause of the manifestation in a reaction event." />
  <caseSensitive value="true" />
  <valueSet value="http://hl7.org/fhir/ValueSet/reaction-event-certainty" />
  <content value="complete" />
  <concept>
    <code value="unlikely" />
    <display value="Unlikely" />
    <definition value="There is a low level of clinical certainty that the reaction was caused by the identified substance." />
  </concept>
  <concept>
    <code value="likely" />
    <display value="Likely" />
    <definition value="There is a high level of clinical certainty that the reaction was caused by the identified substance." />
  </concept>
  <concept>
    <code value="confirmed" />
    <display value="Confirmed" />
    <definition value="There is a very high level of clinical certainty that the reaction was due to the identified substance, which may include clinical evidence by testing or rechallenge." />
  </concept>
  <concept>
    <code value="unknown" />
    <display value="Unknown" />
    <definition value="The clinical certainty that the reaction was caused by the identified substance is unknown.  It is an explicit assertion that certainty is not known." />
  </concept>
</CodeSystem>