WHO Immunization Implementation Guide
1.0.0 - release

This page is part of the Immunizations (v1.0.0: Release) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions

CodeSystem: IMMZ.C CodeSystem for Data Elements

Official URL: http://smart.who.int/immunizations/CodeSystem/IMMZ.C Version: 1.0.0
Active as of 2026-10-02 Computable Name: IMMZ_C

CodeSystem for IMMZ.C Data Elements

This Code system is referenced in the content logical definition of the following value sets:

This case-insensitive code system http://smart.who.int/immunizations/CodeSystem/IMMZ.C defines the following codes:

CodeDisplayDefinition
DE1 Unique identifier Unique identifier for the client, according to the policies applicable to each country. There can be more than one unique identifier used to link records (e.g. national identification [ID], health ID, immunization information system ID, medical record ID)
DE2 Name The full name of the client
DE3 First name Client's first name or given name
DE4 Family name Client's family name or last name
DE5 Sex Documentation of a specific instance of sex information for the client
DE6 Male Client's biological sex is male
DE7 Female Client's biological sex is female
DE8 Biological sex not specified Client's biological sex is not specified
DE9 Intersex Client's biological sex is intersex
DE10 Date of birth Client's date of birth (DOB) if known; if unknown, use assigned DOB for administrative purposes
DE13 Age The client's calculated age (presented as number of years, months, weeks, days) based on the DOB and the visit date
DE14 Caregivers (multiple) Details of the client's caregiver (person) who could be next of kin (e.g. partner, husband, mother, sibling, etc.)
DE15 Caregiver's full name The full name of the client's caregiver
DE16 Caregiver's first name First or given name of the client's caregiver
DE17 Caregiver's family name Family name or last name of the client's caregiver
DE18 Contact phone number Client's phone number; can be a landline or a mobile phone number
DE19 Address Client's home address or address that the client is consenting to disclose