<?xml version="1.0" encoding="UTF-8"?>

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="medication-statement-adherence"/>
  <meta>
    <lastUpdated value="2026-03-16T22:59:53.445+00:00"/>
  </meta>
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml">
      <p class="res-header-id">
        <b>Generated Narrative: CodeSystem medication-statement-adherence</b>
      </p>
      <a name="medication-statement-adherence"> </a>
      <a name="hcmedication-statement-adherence"> </a>
      <p>This case-sensitive code system 
        <code>http://hl7.org/fhir/CodeSystem/medication-statement-adherence</code> defines the following codes in a Is-A hierarchy:
      </p>
      <table class="codes">
        <tr>
          <td>
            <b>Lvl</b>
          </td>
          <td style="white-space:nowrap">
            <b>Code</b>
          </td>
          <td>
            <b>Display</b>
          </td>
          <td>
            <b>Definition</b>
          </td>
        </tr>
        <tr>
          <td>1</td>
          <td style="white-space:nowrap">taking
            <a name="medication-statement-adherence-taking"> </a>
          </td>
          <td>Taking</td>
          <td>The medication is being taken.</td>
        </tr>
        <tr>
          <td>2</td>
          <td style="white-space:nowrap">  taking-as-directed
            <a name="medication-statement-adherence-taking-as-directed"> </a>
          </td>
          <td>Taking As Directed</td>
          <td>The medication is being taken as directed.</td>
        </tr>
        <tr>
          <td>2</td>
          <td style="white-space:nowrap">  taking-not-as-directed
            <a name="medication-statement-adherence-taking-not-as-directed"> </a>
          </td>
          <td>Taking Not As Directed</td>
          <td>The medication is not being taken as directed.</td>
        </tr>
        <tr>
          <td>1</td>
          <td style="white-space:nowrap">not-taking
            <a name="medication-statement-adherence-not-taking"> </a>
          </td>
          <td>Not Taking</td>
          <td>The medication is not being taken.</td>
        </tr>
        <tr>
          <td>2</td>
          <td style="white-space:nowrap">  on-hold
            <a name="medication-statement-adherence-on-hold"> </a>
          </td>
          <td>On Hold</td>
          <td>The medication is on hold.</td>
        </tr>
        <tr>
          <td>3</td>
          <td style="white-space:nowrap">    on-hold-as-directed
            <a name="medication-statement-adherence-on-hold-as-directed"> </a>
          </td>
          <td>On Hold As Directed</td>
          <td>The medication is on hold as directed.</td>
        </tr>
        <tr>
          <td>3</td>
          <td style="white-space:nowrap">    on-hold-not-as-directed
            <a name="medication-statement-adherence-on-hold-not-as-directed"> </a>
          </td>
          <td>On Hold Not As Directed</td>
          <td>The medication is on hold not as directed.</td>
        </tr>
        <tr>
          <td>2</td>
          <td style="white-space:nowrap">  stopped
            <a name="medication-statement-adherence-stopped"> </a>
          </td>
          <td>Stopped</td>
          <td>The medication is stopped.</td>
        </tr>
        <tr>
          <td>3</td>
          <td style="white-space:nowrap">    stopped-as-directed
            <a name="medication-statement-adherence-stopped-as-directed"> </a>
          </td>
          <td>Stopped As Directed</td>
          <td>The medication is stopped as directed.</td>
        </tr>
        <tr>
          <td>3</td>
          <td style="white-space:nowrap">    stopped-not-as-directed
            <a name="medication-statement-adherence-stopped-not-as-directed"> </a>
          </td>
          <td>Stopped Not As Directed</td>
          <td>The medication is stopped not as directed.</td>
        </tr>
        <tr>
          <td>1</td>
          <td style="white-space:nowrap">unknown
            <a name="medication-statement-adherence-unknown"> </a>
          </td>
          <td>Unknown</td>
          <td>Whether the medication is being taken or not is not currently known.</td>
        </tr>
      </table>
    </div>
  </text>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="phx"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="informative"/>
  </extension>
  <url value="http://hl7.org/fhir/CodeSystem/medication-statement-adherence"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.1981"/>
  </identifier>
  <version value="6.0.0-ballot4"/>
  <name value="MedicationStatementAdherenceCodes"/>
  <title value="MedicationStatement Adherence Codes"/>
  <status value="active"/>
  <experimental value="false"/>
  <publisher value="HL7 International"/>
  <description value="MedicationStatement Adherence Codes"/>
  <jurisdiction>
    <coding>
      <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/>
      <code value="001"/>
      <display value="World"/>
    </coding>
  </jurisdiction>
  <caseSensitive value="true"/>
  <valueSet value="http://hl7.org/fhir/ValueSet/medication-statement-adherence"/>
  <hierarchyMeaning value="is-a"/>
  <content value="complete"/>
  <concept>
    <code value="taking"/>
    <display value="Taking"/>
    <definition value="The medication is being taken."/>
    <concept>
      <code value="taking-as-directed"/>
      <display value="Taking As Directed"/>
      <definition value="The medication is being taken as directed."/>
    </concept>
    <concept>
      <code value="taking-not-as-directed"/>
      <display value="Taking Not As Directed"/>
      <definition value="The medication is not being taken as directed."/>
    </concept>
  </concept>
  <concept>
    <code value="not-taking"/>
    <display value="Not Taking"/>
    <definition value="The medication is not being taken."/>
    <concept>
      <code value="on-hold"/>
      <display value="On Hold"/>
      <definition value="The medication is on hold."/>
      <concept>
        <code value="on-hold-as-directed"/>
        <display value="On Hold As Directed"/>
        <definition value="The medication is on hold as directed."/>
      </concept>
      <concept>
        <code value="on-hold-not-as-directed"/>
        <display value="On Hold Not As Directed"/>
        <definition value="The medication is on hold not as directed."/>
      </concept>
    </concept>
    <concept>
      <code value="stopped"/>
      <display value="Stopped"/>
      <definition value="The medication is stopped."/>
      <concept>
        <code value="stopped-as-directed"/>
        <display value="Stopped As Directed"/>
        <definition value="The medication is stopped as directed."/>
      </concept>
      <concept>
        <code value="stopped-not-as-directed"/>
        <display value="Stopped Not As Directed"/>
        <definition value="The medication is stopped not as directed."/>
      </concept>
    </concept>
  </concept>
  <concept>
    <code value="unknown"/>
    <display value="Unknown"/>
    <definition value="Whether the medication is being taken or not is not currently known."/>
  </concept>
</CodeSystem>