---
type: "codesystem"
title: "Protocol Activity Definition Category"
codesystem: "protocol-activity-category"
---
# Protocol Activity Definition Category

- **Official URL**: http://hl7.org/fhir/protocol-activity-category
- **Version**: 6.0.0
- **Name**: ProtocolActivityDefinitionCategory
- **Title**: Protocol Activity Definition Category
- **Description**: ProtocolActivityDefinitionCategory

## Concepts

| Code | Display | Definition |
| --- | --- | --- |
| communication | Communication | To communicate with a participant in some way. |
| diet | Diet | To consume food of a specified nature. |
| drug | Drug | To consume/receive a drug, vaccine or other product. |
| encounter | Encounter | To meet with the patient (in-patient, out-patient, etc.). |
| observation | Observation | To capture information about a patient (vitals, labs, diagnostic images, etc.). |
| procedure | Procedure | To modify the patient in some way (surgery, physiotherapy, education, counseling, etc.). |
| referral | Referral | To refer the patient to receive some service. |
| supply | Supply | To provide something to the patient (medication, medical supply, etc.). |
| other | Other | Some other form of action. |

## CodeSystem XML



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

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="protocol-activity-category"/>
  <meta>
    
  </meta>
  <url value="http://hl7.org/fhir/protocol-activity-category"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.1834"/>
  </identifier>
  <version value="6.0.0"/>
  <name value="ProtocolActivityDefinitionCategory"/>
  <title value="Protocol Activity Definition Category"/>
  <experimental value="true"/>
  <description value="ProtocolActivityDefinitionCategory"/>
  <concept>
    <code value="communication"/>
    <display value="Communication"/>
    <definition value="To communicate with a participant in some way."/>
  </concept>
  <concept>
    <code value="diet"/>
    <display value="Diet"/>
    <definition value="To consume food of a specified nature."/>
  </concept>
  <concept>
    <code value="drug"/>
    <display value="Drug"/>
    <definition value="To consume/receive a drug, vaccine or other product."/>
  </concept>
  <concept>
    <code value="encounter"/>
    <display value="Encounter"/>
    <definition value="To meet with the patient (in-patient, out-patient, etc.)."/>
  </concept>
  <concept>
    <code value="observation"/>
    <display value="Observation"/>
    <definition value="To capture information about a patient (vitals, labs, diagnostic images, etc.)."/>
  </concept>
  <concept>
    <code value="procedure"/>
    <display value="Procedure"/>
    <definition value="To modify the patient in some way (surgery, physiotherapy, education, counseling, etc.)."/>
  </concept>
  <concept>
    <code value="referral"/>
    <display value="Referral"/>
    <definition value="To refer the patient to receive some service."/>
  </concept>
  <concept>
    <code value="supply"/>
    <display value="Supply"/>
    <definition value="To provide something to the patient (medication, medical supply, etc.)."/>
  </concept>
  <concept>
    <code value="other"/>
    <display value="Other"/>
    <definition value="Some other form of action."/>
  </concept>
</CodeSystem>
```