| Code | Display | status | deprecated | v2-concComment | v2-concCommentAsPub | HL7usageNotes | status | deprecated | v2-concComment | v2-concCommentAsPub | HL7usageNotes | Comments |
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 CAP | College of American Pathologist Accreditation Number | N | N | | Use to identify assigning authority IDs, when an OID is not available. | Use to identify assigning authority IDs, when an OID is not available. | | | N | N | | Use to identify assigning authority IDs, when an OID is not available. | Use to identify assigning authority IDs, when an OID is not available. | | | |
| CLIA | Clinical Laboratory Improvement Amendments | A | A | | Allows for the ability to designate organization identifier as a “CLIA” assigned number (for labs) | Allows for the ability to designate organization identifier as a “CLIA” assigned number (for labs) | | | A | A | | Allows for the ability to designate organization identifier as a “CLIA” assigned number (for labs) | Allows for the ability to designate organization identifier as a “CLIA” assigned number (for labs) | | | |
| CLIP | Clinical laboratory Improvement Program | A | A | | Allows for the ability to designate organization identifier as a “CLIP” assigned number (for labs). Used by US Department of Defense. | Allows for the ability to designate organization identifier as a “CLIP” assigned number (for labs). Used by US Department of Defense. | | | A | A | | Allows for the ability to designate organization identifier as a “CLIP” assigned number (for labs). Used by US Department of Defense. | Allows for the ability to designate organization identifier as a “CLIP” assigned number (for labs). Used by US Department of Defense. | | | |
| DNS | Domain Name System | A | A | | An Internet host name, in accordance with RFC 1035; or an IP address. Either in ASCII or as integers, with periods between components (“dotted” notation). | An Internet host name, in accordance with RFC 1035; or an IP address. Either in ASCII or as integers, with periods between components (“dotted” notation). | | | A | A | | An Internet host name, in accordance with RFC 1035; or an IP address. Either in ASCII or as integers, with periods between components (“dotted” notation). | An Internet host name, in accordance with RFC 1035; or an IP address. Either in ASCII or as integers, with periods between components (“dotted” notation). | | | |
| EUI64 | IEEE 64-bit Extended Unique Identifier | A | A | | IEEE 64-bit Extended Unique Identifier is comprised of a 24-bit company identifier and a 40-bit instance identifier. The value shall be formatted as 16 ASCII HEX digits, for example, “AABBCC1122334455”. The 24-bit company identifier, formally known as Organizationally Unique Identifier (OUI-24), is guaranteed to be globally unique. The 40-bit extensions are assigned by manufacturers. This identifier is often used in equipment interfaces (e.g., “MAC” address format for IPv4 & IPv6). [See http://standards.ieee.org/regauth/oui/tutorials/EUI64.htmlfor a detailed explanation of the format.]OUI-24 values are administered by the IEEE Registration Authority. | IEEE 64-bit Extended Unique Identifier is comprised of a 24-bit company identifier and a 40-bit instance identifier. The value shall be formatted as 16 ASCII HEX digits, for example, “AABBCC1122334455”. The 24-bit company identifier, formally known as Organizationally Unique Identifier (OUI-24), is guaranteed to be globally unique. The 40-bit extensions are assigned by manufacturers. This identifier is often used in equipment interfaces (e.g., “MAC” address format for IPv4 & IPv6). [See http://standards.ieee.org/regauth/oui/tutorials/EUI64.htmlfor a detailed explanation of the format.]OUI-24 values are administered by the IEEE Registration Authority. | OUI-24 values are administered by the IEEE Registration Authority. | OUI-24 values are administered by the IEEE Registration Authority. | | A | A | | IEEE 64-bit Extended Unique Identifier is comprised of a 24-bit company identifier and a 40-bit instance identifier. The value shall be formatted as 16 ASCII HEX digits, for example, “AABBCC1122334455”. The 24-bit company identifier, formally known as Organizationally Unique Identifier (OUI-24), is guaranteed to be globally unique. The 40-bit extensions are assigned by manufacturers. This identifier is often used in equipment interfaces (e.g., “MAC” address format for IPv4 & IPv6). [See http://standards.ieee.org/regauth/oui/tutorials/EUI64.htmlfor a detailed explanation of the format.]OUI-24 values are administered by the IEEE Registration Authority. | IEEE 64-bit Extended Unique Identifier is comprised of a 24-bit company identifier and a 40-bit instance identifier. The value shall be formatted as 16 ASCII HEX digits, for example, “AABBCC1122334455”. The 24-bit company identifier, formally known as Organizationally Unique Identifier (OUI-24), is guaranteed to be globally unique. The 40-bit extensions are assigned by manufacturers. This identifier is often used in equipment interfaces (e.g., “MAC” address format for IPv4 & IPv6). [See http://standards.ieee.org/regauth/oui/tutorials/EUI64.htmlfor a detailed explanation of the format.]OUI-24 values are administered by the IEEE Registration Authority. | OUI-24 values are administered by the IEEE Registration Authority. | OUI-24 values are administered by the IEEE Registration Authority. | | |
| GUID | globally unique identifier | A | A | | Same as UUID. Retained for backward compatibility only as of v2.7; use UUID instead | Same as UUID. Retained for backward compatibility only as of v2.7; use UUID instead | Retained for backward compatibility only as of v2.7; use UUID instead | Retained for backward compatibility only as of v2.7; use UUID instead | | A | A | | Same as UUID. Retained for backward compatibility only as of v2.7; use UUID instead | Same as UUID. Retained for backward compatibility only as of v2.7; use UUID instead | Retained for backward compatibility only as of v2.7; use UUID instead | Retained for backward compatibility only as of v2.7; use UUID instead | | |
| HCD | CEN Healthcare Coding Identifier | A | A | | The CEN Healthcare Coding Scheme Designator. Retained for backward compatibility only as of v2.7; does not identify Assigning Authorities | The CEN Healthcare Coding Scheme Designator. Retained for backward compatibility only as of v2.7; does not identify Assigning Authorities | Retained for backward compatibility only as of v2.7; does not identify Assigning Authorities | Retained for backward compatibility only as of v2.7; does not identify Assigning Authorities | | A | A | | The CEN Healthcare Coding Scheme Designator. Retained for backward compatibility only as of v2.7; does not identify Assigning Authorities | The CEN Healthcare Coding Scheme Designator. Retained for backward compatibility only as of v2.7; does not identify Assigning Authorities | Retained for backward compatibility only as of v2.7; does not identify Assigning Authorities | Retained for backward compatibility only as of v2.7; does not identify Assigning Authorities | | |
| HL7 | HL7 registration schemes | A | A | | Retained for backward compatibility only as of v2.7; HL7 assigns ISO OIDs for Assigning Authorities | Retained for backward compatibility only as of v2.7; HL7 assigns ISO OIDs for Assigning Authorities | Retained for backward compatibility only as of v2.7; HL7 assigns ISO OIDs for Assigning Authorities | Retained for backward compatibility only as of v2.7; HL7 assigns ISO OIDs for Assigning Authorities | | A | A | | Retained for backward compatibility only as of v2.7; HL7 assigns ISO OIDs for Assigning Authorities | Retained for backward compatibility only as of v2.7; HL7 assigns ISO OIDs for Assigning Authorities | Retained for backward compatibility only as of v2.7; HL7 assigns ISO OIDs for Assigning Authorities | Retained for backward compatibility only as of v2.7; HL7 assigns ISO OIDs for Assigning Authorities | | |
| ISO | ISO Object Identifier | A | A | | An International Standards Organization Object Identifier (OID), in accordance with ISO/IEC 8824. Formatted as decimal digits separated by periods; recommended limit of 64 characters | An International Standards Organization Object Identifier (OID), in accordance with ISO/IEC 8824. Formatted as decimal digits separated by periods; recommended limit of 64 characters | | | A | A | | An International Standards Organization Object Identifier (OID), in accordance with ISO/IEC 8824. Formatted as decimal digits separated by periods; recommended limit of 64 characters | An International Standards Organization Object Identifier (OID), in accordance with ISO/IEC 8824. Formatted as decimal digits separated by periods; recommended limit of 64 characters | | | |
| L | Local | A | A | | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | | | A | A | | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | | | |
| L,M,N | Local | D | D | | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | Retained for backward compatibility only as of v 2.8 | Retained for backward compatibility only as of v 2.8 | | D | D | | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | Retained for backward compatibility only as of v 2.8 | Retained for backward compatibility only as of v 2.8 | | |
| M | Local | A | A | | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | | | A | A | | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | | | |
| N | Local | A | A | | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | | | A | A | | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8 | | | |
| NPI | US National Provider Identifier | N | N | | Use to identify assigning authority IDs, when an OID is not available. Especially important in the CNN datatype. Namespace maintained and published in the US. | Use to identify assigning authority IDs, when an OID is not available. Especially important in the CNN datatype. Namespace maintained and published in the US. | | | N | N | | Use to identify assigning authority IDs, when an OID is not available. Especially important in the CNN datatype. Namespace maintained and published in the US. | Use to identify assigning authority IDs, when an OID is not available. Especially important in the CNN datatype. Namespace maintained and published in the US. | | | |
| Random | Random | A | A | | Usually a base64 encoded string of random bits.Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. Note: Random IDs are typically used for instance identifiers, rather than an identifier of an Assigning Authority that issues instance identifiers | Usually a base64 encoded string of random bits.Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. Note: Random IDs are typically used for instance identifiers, rather than an identifier of an Assigning Authority that issues instance identifiers | Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. | Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. | Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. | Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. | A | A | | Usually a base64 encoded string of random bits.Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. Note: Random IDs are typically used for instance identifiers, rather than an identifier of an Assigning Authority that issues instance identifiers | Usually a base64 encoded string of random bits.Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. Note: Random IDs are typically used for instance identifiers, rather than an identifier of an Assigning Authority that issues instance identifiers | Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. | Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. | Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. | Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. | |
| URI | Uniform Resource Identifier | A | A | | | | | A | A | | | | | |
| UUID | Universal Unique Identifier | A | A | | The DCE Universal Unique Identifier, in accordance with RFC 4122. Recommended format is 32 hexadecimal digits separated by hyphens, in the digit grouping 8-4-4-4-12 | The DCE Universal Unique Identifier, in accordance with RFC 4122. Recommended format is 32 hexadecimal digits separated by hyphens, in the digit grouping 8-4-4-4-12 | | | A | A | | The DCE Universal Unique Identifier, in accordance with RFC 4122. Recommended format is 32 hexadecimal digits separated by hyphens, in the digit grouping 8-4-4-4-12 | The DCE Universal Unique Identifier, in accordance with RFC 4122. Recommended format is 32 hexadecimal digits separated by hyphens, in the digit grouping 8-4-4-4-12 | | | |
| x400 | X.400 MHS identifier | A | A | | Recommended format is in accordance with RFC 1649 | Recommended format is in accordance with RFC 1649 | | | A | A | | Recommended format is in accordance with RFC 1649 | Recommended format is in accordance with RFC 1649 | | | |
| x500 | X500 directory Name | A | A | | | | | A | A | | | | | |