---
type: "codesystem"
title: "MedicationStatement Adherence Codes"
codesystem: "medication-statement-adherence"
---
# MedicationStatement Adherence Codes

- **Official URL**: http://hl7.org/fhir/CodeSystem/medication-statement-adherence
- **Version**: 6.0.0
- **Status**: active
- **Name**: MedicationStatementAdherenceCodes
- **Title**: MedicationStatement Adherence Codes
- **Description**: MedicationStatement Adherence Codes
- **Case Sensitive**: true
- **Content**: complete

## Concepts

| Code | Display | Definition |
| --- | --- | --- |
| taking | Taking | The medication is being taken. |
| not-taking | Not Taking | The medication is not being taken. |
| unknown | Unknown | Whether the medication is being taken or not is not currently known. |

## CodeSystem XML



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

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="medication-statement-adherence"/>
  <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"/>
  <name value="MedicationStatementAdherenceCodes"/>
  <title value="MedicationStatement Adherence Codes"/>
  <status value="active"/>
  <experimental value="false"/>
  <description value="MedicationStatement Adherence Codes"/>
  <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>
```