All of the identifiers assigned by LOINC, including LOINC codes, Part codes (i.e. LP* codes), Answer codes (i.e. LA* codes), Answer List codes (i.e. LL* codes), and Group codes (i.e. LG codes) collectively belong to the LOINC code system. Depending on your technology or application, you may identify the code system in different ways. For example, in HL7 Version 2 it would typically be the abbreviation “LN”, in CDA documents it would be an OID (2.16.840.1.113883.6.1), and in FHIR it would be the URI:
http://loinc.org12.4.1 LOINC-related OIDs
This is a partial listing of OIDs identifying LOINC and LOINC collections. Notably this list does not include the thousands of OIDs used to represent individual LOINC Answer Lists. These can be found in the LOINC download file within Accessory Files / AnswerFile / AnswerList.csv. Answer List OIDs are also available from the ValueSet resource in the LOINC Terminology Service.
More information on OIDs can be found on the HL7 OID registry or the global OID repository.
- 1.3.6.1.4.1.12009
Registration Authority OID root for Regenstrief Institute, Inc. - 1.3.6.1.4.1.12009.10.2.2
LOINC Collection: Universal Lab Orders Value Set from LOINC - 1.3.6.1.4.1.12009.10.2.3
LOINC Collection: LOINC Top 2000+ Lab Observations – US Version - 1.3.6.1.4.1.12009.10.2.4
LOINC Collection: LOINC Top 2000+ Lab Observations – SI Version - 1.3.6.1.4.1.12009.10.2.5
LOINC Collection: Imaging Documents - 1.3.6.1.4.1.12009.10.2.5.1
LOINC/RSNA Radiology Playbook - 1.3.6.1.4.1.12009.10.2.5.1.1
LOINC/RSNA Core Radiology Playbook - 1.3.6.1.4.1.12009.10.3.1
Table of Example UCUM Codes for Electronic Messaging - 2.16.840.1.113883.6.1
LOINC, the vocabulary standard/code system