Unified Medical Language System® (UMLS®)
2010AA LOINC Source Information
Skip to: Notes, Summary of Changes, Summary of Source-Provided Files, Source-Provided File Details
In addition to the LNC SAB, LOINC includes nine subsources, which are assigned by an algorithm using field 43 (EXTERNAL_COPYRIGHT_NOTICE), field 9 (CLASS) and field 7 (METHOD_TYP). The
representation described below applies to all subsources.
Summary of Changes in this version)
The subsource assignment algorithm was adjusted to assign three new subsources:
Adapted from: Inouye SK, vanDyck CH, Alessi CA, Balkin S, Siegal AP, Horwitz RI. Clarifying confusion: The Confusion Assessment Method. A new method for detection of delirium. Ann Intern Med. 1990; 113: 941-948. Confusion Assessment Method: Training Manual and Coding Guide, Copyright 2003, Sharon K. Inouye, M.D., MPH.
LOINC includes data from two versions of the Minimum Data Set (MDS): 2.0 and 3.0. MDS is part of the U.S. federally mandated process for clinical assessment of all residents in Medicare or Medicaid certified nursing homes. This process provides a comprehensive assessment of each resident's functional capabilities and helps nursing home staff identify health problems. MDS is maintained by the Institute of Gerontology, University of Michigan, Ann Arbor, Michigan.
To clarify version information, the SAB LNC_MDS has been removed. Its content remains and is divided between the two new sources LNC_MDS20 and LNC_MDS30.
New Termtype: OLC
Obsolete Long Common Name (SUPPRESS = "O"). Previously, all atoms created from field 46, LONG_COMMON_NAME, were represented with TTY = "LC".
Source-Provided Files: Summary)
The complete LOINC distribution includes the following.
Documentation and Reference
|LOINC_ReleaseNotes.txt||Release notes, updated with each LOINC version|
|LOINCManual.pdf||The complete documentation, including tables used to expand abbreviations|
|LOINCDB.TXT||Primary LOINC data files|
|LOINC_PARTS_V2-29_2009-12-30.txt||Parts names and codes|
|LOINC_PART_LINKS_V2-29_2009-12-30.txt||Part links, for relationships (?) and hierarchy|
|LOINC_V229_MULTI-AXIAL_HIERARCHY.CSV||The records in this file represent nodes of the hierarchy, whether LOINC Parts or full LOINC codes.
The ordered sequence at any level of the hierarchy is given by the SEQUENCE field. Top level nodes in the hierarchy are those where PATH_TO_ROOT is null.
This is a "Comma Separated Value" text file.
LOINCDB.TXT:Fields that are for internal (LOINC) use are not processed for the Metathesaurus.
Fields that are not used are indicated by "Not used" in the "Representation" columns below.
Source-Provided Files: Detailsreturn to top)
Details on format of input files and representation of source data. Consult the LOINC documentation for additional details.
|1||LOINC_NUM||Unique Code; format is #####-#||MRCONSO.CODE|
|2||COMPONENT||Fields 2-7 contain the six parts of the name.
The fully-specified name for a given LOINC code is constructed by concatenating the contents of these fields,
inserting a colon (":") between each element.
|8||RELAT_NMS||Field no longer maintained.
Replaced by field 38, RelatedNames2
|MRSAT.ATN = "LRN"|
|9||CLASS||Arbitrary classification of the terms for grouping related observations together. See Table 21 in the LOINC Users’ Guide for values.||
|10||SOURCE||Internal use only||Not used|
|11||DT_LAST_CH||Date last changed; format is YYYYMMDD||MRSAT.ATN = "LLR"|
|12||CHNG_TYPE||Change Type Code: "DEL" = delete (deprecate); "ADD" = add; "NAM" = change to Analyte/Component (field #2); "MAJ" = change to name field other than #2 (#3 - #7); "MIN" = change to field other than name; "UND" = undelete||MRSAT.ATN = "LCT"|
|13||COMMENTS||Free-text comments relating to the test result||MRSAT.ATN = "SOS"|
|14||ANSWERLIST||Contents of this field have been moved to structured lists which may be viewed using RELMA||MRSAT.ATN = "LAL"|
|15||STATUS||Deprecated or superseded status indicated by DEL||
|16||MAP_TO||For codes with status = "DEL", contains the LOINC code of the new term that should be used||
|17||SCOPE||Not currently used||Not used|
|18||CONSUMER_NAME||Consumer-friendly name for this term. Content is experimental (beta).||Not used|
|19||IPCC_UNITS||Moved; can be viewed in details screen in RELMA.||Not used|
|20||REFERENCE||References to medical literature, product announcements or other written sources.||MRSAT.ATN = "LRF"|
|21||EXACT_CMP_SY||Exact synonym for the "core component" of the component name.||
|22||MOLAR_MASS||Molecular weights, contributed by IUPAC||MRSAT.ATN = "LMM"|
|23||CLASSTYPE||1 = Laboratory; 2 = Clinical class; 3 = Claims attachments; 4=Surveys||
|24||FORMULA||Regression equation details||MRSAT.ATN = "LFO"|
|25||SPECIES||Indicates which non-human species this code applies to||MRSAT.ATN = "LSP"|
|26||EXMPL_ANSWERS||Examples of valid answers||MRSAT.ATN = "LEA"|
|27||ACSSYM||Chemical name synonyms, alternative names and chemical formulae, supplied by CAS||MRSAT.ATN = "LCA"; an attribute is created for each comma-separated value in this field|
|28||BASE_NAME||Chemical base name from CAS||MRSAT.ATN = "LCB"|
|29||FINAL||Internal LOINC use||Not used|
|30||NAACCR_ID||North American Association of Central Cancer Registries Identification Number||MRSAT.ATN = "LNC"|
|31||CODE_TABLE||Examples on CR0050 Cancer Registry||MRSAT.ATN = "LNE"|
|32||SETROOT||Indicates that this record is the root of a set of LOINC codes||Not processed|
|33||PANELELEMENTS||No longer maintained||LPL|
|34||SURVEY_QUEST_TXT||Question from survey instrument||MRSAT.ATN = "LQT"|
|35||SURVEY_QUEST_SRC||Name of survey instrument and item/question number||MRSAT.ATN = "LQS"|
|36||UNITS_REQUIRED||Y/N indicates whether units are required for OBX segment in a HIPAA attachment||MRSAT.ATN = "LUR"|
|37||SUBMITTED_UNITS||Moved to RELMA||MRSAT.ATN = "LSU"|
|38||RELATEDNAMES2||Synonyms for each part of the fully-specified LOINC name (component, property, time, system, scale, method)||MRSAT.ATN = "LRN2"|
|39||SHORTNAME||Concatenation of the fully-specified LOINC name||MRCONSO.STR, TTY = "OSN", "OOSN"|
|40||ORDER_OBS||Defines term as an order only, observation only, both, or Subset||MRSAT.ATN = "LOR"|
|41||CDISC_COMMON_TESTS||Y indicates member of subset used by CDISC in clinical trials||MRSAT.ATN = "LCD"|
|42||HL7_FIELD_SUBFIELD_ID||Indicates that the content should be delivered in the named field/subfield of the HL7 message.||MRSAT.ATN = "HL7_FIELD_SUBFIELD"|
|43||EXTERNAL_COPYRIGHT_NOTICE||External copyright holder information||
|44||EXAMPLE_UNITS||Indicates representative units||MRSAT.ATN = "EXAMPLE_UNITS"|
|45||INPC_PERCENTAGE||Percent of overall result volume within the INPC||MRSAT.ATN = "INPC_PERCENTAGE"|
|46||LONG_COMMON_NAME||Readable version of LOINC term||MRCONSO.ATN = "LC, OLC"|
|47||HL7_V2_DATATYPE||HL7 version 2.x datatype||MRSAT.ATN = "HL7_V2_DATATYPE"|
|48||HL7_V3_DATATYPE||HL7 version 3.0 datatype||MRSAT.ATN = "HL7_V3_DATATYPE"|
|49||CURATED_RANGE_AND_UNITS||List of normal ranges and associated units||MRSAT.ATN = "CURATED_RANGE_AND_UNITS"|
|50||DOCUMENT_SECTION||Classification of whether this code can be used as a full document, section of a document, or both||MRSAT.ATN = "DOCUMENT_SECTION"|
|51||DEFINITION_DESCRIPTION_HELP||Similar to comments; describes term and how to use it.||MRSAT.ATN = "DEFINITION_DESCRIPTION_HELP"|
|52||EXAMPLE_UCUM_UNITS||Example units of measure expressed as UCUM units||MRSAT.ATN = "EXAMPLE_UCUM_UNITS"|
|2||PART_TYPE||Values are: ADJUSTMENT, CHALLENGE, CLASS,
COMPONENT, COUNT, DIVISORS, FRAGMENTS FOR SYNONYMS,
METHOD, MULTI-AXIAL, MULTIPART, PROPERTY, QUOTIENTS,
SCALE, SUFFIX, SUPER SYSTEM, SUPERCLASS,
SUPERSYSTEMMULTI-AXIAL, SYSTEM, TIME, TIME MODIFIER.
Parts with PART_TYPE of MULTIPART, QUOTIENTS, or SUPERCLASS are not included in Metathesaurus source processing;
used to create relationships between LOINC PARTS and LOINC IDs.
|3||NAME_CASE_INSENSITIVE||MRCONSO.STR, TTY = "LPN'|
|1||LOINC_NUM||LOINC CODE||A relationship (STYPE = "CODE") is created between the LOINC CODE and the LOINC PART.
The REL = "RO";
The RELA is assigned based on the LOINC_PARTS.PART_TYPE of the L_PART_ID as follows:
Note: No PARTS with PART TYPEs of "COUNT," "MULTI-AXIAL" and "SUPERSYSTEMMULTI-AXIAL"
|2||L_PART_ID||LOINC PART CODE|
|3||LINK_TYPE||Value is always "1"||Not processed|
|1||PATH_TO_ROOT||Used to create the hierarchy tree under the " LOINCPARTS" concept|
|4||CODE||The identifier of the "child" concept; all end nodes are LOINC IDs; ancestors are LOINC PARTs|