HL7 Electronic Health Record System Functional Model, Release 2.1.1
2.1.1 - Normative

HL7 Electronic Health Record System Functional Model, Release 2.1.1, published by HL7 International / Electronic Health Records. This guide is not an authorized publication; it is the continuous build for version 2.1.1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/ehrsfm-ig/ and changes regularly. See the Directory of published versions

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

Page standards status: Normative

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    {
      "resourceType" : "Requirements",
      "id" : "EHRSFMR2-TI.3",
      "meta" : {
        "profile" : [
          🔗 "http://hl7.org/ehrs/uv/ehrsfmr2/StructureDefinition/FMFunction"
        ]
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      "language" : "en",
      "text" : {
        "status" : "extensions",
        "div" : "<div xml:lang=\"en\" xmlns=\"http://www.w3.org/1999/xhtml\" lang=\"en\">\n    \n    \n    <div id=\"description\"><b>Description <a href=\"https://hl7.org/fhir/versions.html#std-process\" title=\"Informative Content\" class=\"informative-flag\">I</a>:</b> <div><p>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.</p>\n<p>An 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.</p>\n</div></div>\n    \n    \n    \n    <div id=\"requirements\"><b>Criteria <a href=\"https://hl7.org/fhir/versions.html#std-process\" title=\"Normative Content\" class=\"normative-flag\">N</a>:</b></div>\n    \n    <table id=\"statements\" class=\"grid dict\">\n        \n        <tr>\n            <td style=\"padding-left: 4px;\">\n            TI.3#01\n            </td>\n            <td style=\"padding-left: 4px;\">\n            SHALL\n            \n                \n            \n            \n            \n            </td>\n            <td style=\"padding-left: 4px;\" class=\"requirement\">\n                <div><p>The system SHALL provide the ability to manage internal registry services and directories.</p>\n</div>\n                \n            </td>\n        </tr>\n        \n        <tr>\n            <td style=\"padding-left: 4px;\">\n            TI.3#02\n            </td>\n            <td style=\"padding-left: 4px;\">\n            SHALL\n            \n                \n            \n            \n            \n            </td>\n            <td style=\"padding-left: 4px;\" class=\"requirement\">\n                <div><p>The system SHALL provide the ability to exchange information with external registry services and directories.</p>\n</div>\n                \n            </td>\n        </tr>\n        \n        <tr>\n            <td style=\"padding-left: 4px;\">\n            TI.3#03\n            </td>\n            <td style=\"padding-left: 4px;\">\n            SHALL\n            \n                \n            \n            \n            \n            </td>\n            <td style=\"padding-left: 4px;\" class=\"requirement\">\n                <div><p>The system SHALL provide the ability to exchange information securely with external registry services and directories.</p>\n</div>\n                \n            </td>\n        </tr>\n        \n        <tr>\n            <td style=\"padding-left: 4px;\">\n            TI.3#04\n            </td>\n            <td style=\"padding-left: 4px;\">\n            SHALL\n            \n                \n            \n            \n            \n            </td>\n            <td style=\"padding-left: 4px;\" class=\"requirement\">\n                <div><p>The system SHALL conform to function <a href=\"Requirements-EHRSFMR2-TI.5.1.html\">TI.5.1</a> (Application and Structured-Document Interchange Standards) to exchange information with external registry services and directories.</p>\n</div>\n                \n            </td>\n        </tr>\n        \n        <tr>\n            <td style=\"padding-left: 4px;\">\n            TI.3#05\n            </td>\n            <td style=\"padding-left: 4px;\">\n            SHOULD\n            \n                \n            \n            \n            \n            </td>\n            <td style=\"padding-left: 4px;\" class=\"requirement\">\n                <div><p>The system SHOULD capture and render local registry services and directory information through standards-based interfaces.</p>\n</div>\n                \n            </td>\n        </tr>\n        \n        <tr>\n            <td style=\"padding-left: 4px;\">\n            TI.3#06\n            </td>\n            <td style=\"padding-left: 4px;\">\n            SHOULD\n            \n                \n            \n            <span style=\"border-radius: 999px;margin: 2px 2px;font-size: 10px;display: inline-block;padding: 3px 5px;letter-spacing: 0.5px;line-height: 1;white-space: nowrap;background-color: #f3e5ff;color: #7b1fa2;border: 1px solid #d1a3ff;\">conditional</span>\n            \n            </td>\n            <td style=\"padding-left: 4px;\" class=\"requirement\">\n                <div><p>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.</p>\n</div>\n                \n            </td>\n        </tr>\n        \n        <tr>\n            <td style=\"padding-left: 4px;\">\n            TI.3#07\n            </td>\n            <td style=\"padding-left: 4px;\">\n            SHOULD\n            \n                \n            \n            \n            \n            </td>\n            <td style=\"padding-left: 4px;\" class=\"requirement\">\n                <div><p>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.</p>\n</div>\n                \n            </td>\n        </tr>\n        \n        <tr>\n            <td style=\"padding-left: 4px;\">\n            TI.3#08\n            </td>\n            <td style=\"padding-left: 4px;\">\n            MAY\n            \n                \n            \n            \n            \n            </td>\n            <td style=\"padding-left: 4px;\" class=\"requirement\">\n                <div><p>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.</p>\n</div>\n                \n            </td>\n        </tr>\n        \n        <tr>\n            <td style=\"padding-left: 4px;\">\n            TI.3#09\n            </td>\n            <td style=\"padding-left: 4px;\">\n            MAY\n            \n                \n            \n            \n            \n            </td>\n            <td style=\"padding-left: 4px;\" class=\"requirement\">\n                <div><p>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.</p>\n</div>\n                \n            </td>\n        </tr>\n        \n        <tr>\n            <td style=\"padding-left: 4px;\">\n            TI.3#10\n            </td>\n            <td style=\"padding-left: 4px;\">\n            MAY\n            \n                \n            \n            \n            \n            </td>\n            <td style=\"padding-left: 4px;\" class=\"requirement\">\n                <div><p>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.</p>\n</div>\n                \n            </td>\n        </tr>\n        \n        <tr>\n            <td style=\"padding-left: 4px;\">\n            TI.3#11\n            </td>\n            <td style=\"padding-left: 4px;\">\n            MAY\n            \n                \n            \n            \n            \n            </td>\n            <td style=\"padding-left: 4px;\" class=\"requirement\">\n                <div><p>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.</p>\n</div>\n                \n            </td>\n        </tr>\n        \n    </table>\n</div>"
      },
      "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"
        }
      ]
    }