# TI.3 Registry and Directory Services (Function) - HL7 Electronic Health Record System Functional Model, Release 2.1.1 v2.1.1

## Requirements: TI.3 Registry and Directory Services (Function) 

 
Enable the use of registry services and directories to uniquely identify, locate and supply links for retrieval of information related to: 
* patients and providers for healthcare purposes;
* payers, health plans, sponsors, and employers for administrative and financial purposes;
* public health agencies for healthcare purposes, and- healthcare resources and devices for resource management purposes.
 



## Resource Content

```json
{
  "resourceType" : "Requirements",
  "id" : "EHRSFMR2-TI.3",
  "meta" : {
    "profile" : [
      "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/FMFunction"
    ]
  },
  "language" : "en",
  "extension" : [
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
      "valueCode" : "normative"
    },
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode" : "ehr"
    }
  ],
  "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/Requirements/EHRSFMR2-TI.3",
  "version" : "2.1.1",
  "name" : "TI_3_Registry_and_Directory_Services",
  "title" : "TI.3 Registry and Directory Services (Function)",
  "status" : "active",
  "date" : "2025-12-13T09:06:06+00:00",
  "publisher" : "HL7 International / Electronic Health Records",
  "contact" : [
    {
      "telecom" : [
        {
          "system" : "url",
          "value" : "http://www.hl7.org/Special/committees/ehr"
        }
      ]
    }
  ],
  "description" : "Enable the use of registry services and directories to uniquely identify, locate and supply links for retrieval of information related to:\n- patients and providers for healthcare purposes;\n- payers, health plans, sponsors, and employers for administrative and financial purposes;\n- public health agencies for healthcare purposes, and- healthcare resources and devices for resource management purposes.",
  "jurisdiction" : [
    {
      "coding" : [
        {
          "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
          "code" : "001",
          "display" : "World"
        }
      ]
    }
  ],
  "purpose" : "Registry and directory service functions are critical to successfully managing the security, interoperability, and the consistency of the health record data across an EHR-S. These services enable the linking of relevant information across multiple information sources within, or external to, an EHR-S for use within an application. This applies to directories/registries internal to the EHR-S as well as directories/registries external to the EHR-S. Transmission may occur automatically or manually and may include small or large amounts of data. Directories and registries support communication between EHR Systems and may be organized hierarchically or in a federated fashion. For example, a patient being treated by a primary care physician for a chronic condition may become ill while out of town. The new provider's EHR-S interrogates a local, regional, or national registry to find the patient's previous records. From the primary care record, a remote EHR-S retrieves relevant information in conformance with applicable patient privacy and confidentiality rules.\n\nAn example of local registry usage is an EHR-S application sending a query message to the Hospital Information System to retrieve a patient's demographic data.",
  "statement" : [
    {
      "extension" : [
        {
          "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/requirements-dependent",
          "valueBoolean" : false
        }
      ],
      "key" : "EHRSFMR2-TI.3-01",
      "label" : "TI.3#01",
      "conformance" : ["SHALL"],
      "conditionality" : false,
      "requirement" : "The system SHALL provide the ability to manage internal registry services and directories.",
      "derivedFrom" : "EHR-S_FM_R1.1 IN.3#1"
    },
    {
      "extension" : [
        {
          "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/requirements-dependent",
          "valueBoolean" : false
        }
      ],
      "key" : "EHRSFMR2-TI.3-02",
      "label" : "TI.3#02",
      "conformance" : ["SHALL"],
      "conditionality" : false,
      "requirement" : "The system SHALL provide the ability to exchange information with external registry services and directories."
    },
    {
      "extension" : [
        {
          "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/requirements-dependent",
          "valueBoolean" : false
        }
      ],
      "key" : "EHRSFMR2-TI.3-03",
      "label" : "TI.3#03",
      "conformance" : ["SHALL"],
      "conditionality" : false,
      "requirement" : "The system SHALL provide the ability to exchange information securely with external registry services and directories.",
      "derivedFrom" : "EHR-S_FM_R1.1 IN.3#2"
    },
    {
      "extension" : [
        {
          "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/requirements-dependent",
          "valueBoolean" : false
        }
      ],
      "key" : "EHRSFMR2-TI.3-04",
      "label" : "TI.3#04",
      "conformance" : ["SHALL"],
      "conditionality" : false,
      "requirement" : "The system SHALL conform to function [TI.5.1](Requirements-EHRSFMR2-TI.5.1.html) (Application and Structured-Document Interchange Standards) to exchange information with external registry services and directories.",
      "derivedFrom" : "EHR-S_FM_R1.1 IN.3#3"
    },
    {
      "extension" : [
        {
          "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/requirements-dependent",
          "valueBoolean" : false
        }
      ],
      "key" : "EHRSFMR2-TI.3-05",
      "label" : "TI.3#05",
      "conformance" : ["SHOULD"],
      "conditionality" : false,
      "requirement" : "The system SHOULD capture and render local registry services and directory information through standards-based interfaces.",
      "derivedFrom" : "EHR-S_FM_R1.1 IN.3#4"
    },
    {
      "extension" : [
        {
          "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/requirements-dependent",
          "valueBoolean" : false
        }
      ],
      "key" : "EHRSFMR2-TI.3-06",
      "label" : "TI.3#06",
      "conformance" : ["SHOULD"],
      "conditionality" : true,
      "requirement" : "IF the system communicates with external registry services and directories (i.e., external to an EHR-S), THEN the system SHOULD capture and render information using standards-based interfaces.",
      "derivedFrom" : "EHR-S_FM_R1.1 IN.3#5"
    },
    {
      "extension" : [
        {
          "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/requirements-dependent",
          "valueBoolean" : false
        }
      ],
      "key" : "EHRSFMR2-TI.3-07",
      "label" : "TI.3#07",
      "conformance" : ["SHOULD"],
      "conditionality" : false,
      "requirement" : "The system SHOULD provide the ability to determine the unique identity of a patient through the use of internal, and/or external registry services or directories.",
      "derivedFrom" : "EHR-S_FM_R1.1 IN.3#6"
    },
    {
      "extension" : [
        {
          "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/requirements-dependent",
          "valueBoolean" : false
        }
      ],
      "key" : "EHRSFMR2-TI.3-08",
      "label" : "TI.3#08",
      "conformance" : ["MAY"],
      "conditionality" : false,
      "requirement" : "The system MAY provide the ability to determine links to healthcare information regarding a patient through the use of internal, and/or external registry services or directories.",
      "derivedFrom" : "EHR-S_FM_R1.1 IN.3#8"
    },
    {
      "extension" : [
        {
          "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/requirements-dependent",
          "valueBoolean" : false
        }
      ],
      "key" : "EHRSFMR2-TI.3-09",
      "label" : "TI.3#09",
      "conformance" : ["MAY"],
      "conditionality" : false,
      "requirement" : "The system MAY provide the ability to determine the unique identity of a provider through the use of internal, and/or external registry services or directories.",
      "derivedFrom" : "EHR-S_FM_R1.1 IN.3#7"
    },
    {
      "extension" : [
        {
          "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/requirements-dependent",
          "valueBoolean" : false
        }
      ],
      "key" : "EHRSFMR2-TI.3-10",
      "label" : "TI.3#10",
      "conformance" : ["MAY"],
      "conditionality" : false,
      "requirement" : "The system MAY provide the ability to determine the identity of payers, health plans and sponsors for administrative or financial purposes through the use of internal, and/or external registry services or directories.",
      "derivedFrom" : "EHR-S_FM_R1.1 IN.3#10"
    },
    {
      "extension" : [
        {
          "url" : "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/requirements-dependent",
          "valueBoolean" : false
        }
      ],
      "key" : "EHRSFMR2-TI.3-11",
      "label" : "TI.3#11",
      "conformance" : ["MAY"],
      "conditionality" : false,
      "requirement" : "The system MAY provide the ability to determine the identity of employers for administrative or financial purposes through the use of internal, and/or external registry services or directories.",
      "derivedFrom" : "EHR-S_FM_R1.1 IN.3#11"
    }
  ]
}

```
