De-Identification Handbook
2.0.0-comment - ballot

De-Identification Handbook, published by IHE IT Infrastructure Technical Committee. This guide is not an authorized publication; it is the continuous build for version 2.0.0-comment built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/IHE/ITI.DeIdHandbook/ and changes regularly. See the Directory of published versions

## ValueSet: Audit Event Subtype for De-Identification

Official URL: https://profiles.ihe.net/ITI/DeId/ValueSet/IHE.BasicAudit.DeIdentification.Subtype | Version: 2.0.0-comment
Active as of 2026-06-09 | Computable Name: AuditEventSubtypeDeidentify

Defines the AuditEvent Subtype for De-Identification events. This is used to indicate that the AuditEvent is specifically for a De-Identification event. The code is based on the ISO 21089 lifecycle code for de-identification.

References

- Audit Event for De-Identification at Source

### Logical Definition (CLD)

- Include these codes as defined in `http://terminology.hl7.org/CodeSystem/iso-21089-lifecycle` version 📦

  Code | Display | Definition
  deidentify | De-Identify (Anononymize) Record Lifecycle Event | Occurs when an agent causes the system to scrub record entry content to reduce the association between a set of identifying data and the data subject in a way that might or might not be reversible.
  pseudonymize | Pseudonymize Record Lifecycle Event | Occurs when an agent causes the system to remove record entry content to reduce the association between a set of identifying data and the data subject in a way that may be reversible.
  reidentify | Re-identify Record Lifecycle Event | Occurs when an agent causes the system to restore information to data that allows identification of information source and/or information subject.

### Expansion

This value set contains 3 concepts

System | Code | Display (en) | Definition | JSON | XML
`http://terminology.hl7.org/CodeSystem/iso-21089-lifecycle` | deidentify | De-Identify (Anononymize) Record Lifecycle Event | Occurs when an agent causes the system to scrub record entry content to reduce the association between a set of identifying data and the data subject in a way that might or might not be reversible. |  |
`http://terminology.hl7.org/CodeSystem/iso-21089-lifecycle` | pseudonymize | Pseudonymize Record Lifecycle Event | Occurs when an agent causes the system to remove record entry content to reduce the association between a set of identifying data and the data subject in a way that may be reversible. |  |
`http://terminology.hl7.org/CodeSystem/iso-21089-lifecycle` | reidentify | Re-identify Record Lifecycle Event | Occurs when an agent causes the system to restore information to data that allows identification of information source and/or information subject. |  |

Explanation of the columns that may appear on this page:

Level | A few code lists that FHIR defines are hierarchical - each code is assigned a level. In this scheme, some codes are under other codes, and imply that the code they are under also applies
System | The source of the definition of the code (when the value set draws in codes defined elsewhere)
Code | The code (used as the code in the resource instance)
Display | The display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application
Definition | An explanation of the meaning of the concept
Comments | Additional notes about how to use the code