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• Provided by the local registry system.  
• Should be worldwide unique.
  • Should follow the construct of hub code + local patient id. 
    • The hub code should be the two-character ISO country code of the registry (e.g. DE for Germany)  
      • In the case of multiple registries in one country, a replacement code will be assigned.
• Should be provided as a user-friendly (displayable) id for use on screens and on documentation.

Proposal:  Make patientId required where possible.  WMDA office to investigate making mandatory in existing Search & Match Service.  If there are legitimate reasons not to (amongst TCs or other), we can add a requirement that the patientId become required at the point of request.

• Generated by the central (SMC) system.
• Must be unique.
• Must be used for all system-to-system patient identification after the initial patient registration.
• Should be displayed on screens and on documentation.