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Unified Medical Language System® (UMLS®)

2012AB LOINC Source Information




Skip to: Notes, Summary of Changes, Summary of Source-Provided Files, Source-Provided File Details

VSABS:

  • LNC240
  • LNC240_AD8_2005
  • LNC240_BRADEN_1988
  • LNC240_CAM_2003
  • LNC240_FACIT
  • LNC240_FLACC_1997
  • LNC240_MDS20
  • LNC240_MDS30
  • LNC240_MLHFQ_1986
  • LNC240_NEUROQOL_2010 (NOTE: The year of this VSAB corrected from 2001 to 2010)
  • LNC240_OASIS_2002
  • LNC240_OPTIMAL_2005
  • LNC240_PHQ_9_1999
  • LNC240_RHO_2008
  • LNC240_SPERTUS_2005
  • LNC240_WHO_2006

Notes

In addition to the LNC SAB, LOINC includes 15 subsources, which are assigned by an algorithm using field 34 (EXTERNAL_COPYRIGHT_NOTICE), field 8 (CLASS) and field 7 (METHOD_TYP).  The representation described below applies to all subsources.  Due to licensing restrictions, concepts from the following subsources are not included in Metathesaurus processing:

  • Ages & Stages Questionnaire
  • Edinburgh Postnatal Depression Scale
  • TIMP (Test of Infant Motor Performance)
  • PROMIS (Patient Reported Outcomes Measurement System survey)
  • Veterans RAND 12 Item Health Survey

Summary of Changes in this version

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New subsources:

RSAB
VSAB Description
LNC_AD8

LNC240_AD8_2005

AD8:Eight-item Informant Interview to Differentiate Aging and Dementia (AD8)
LNC_FACIT
LNC240_FACIT FACIT Measurement System - Functional Assessment of Chronic Illness Therapy (FACIT)
LNC_MLHFQ
LNC240_MLHFQ_1986 Minnesota Living with Heart Failure Questionnaire (MLHFQ)
LNC_SPERTUS
LNC240_SPERTUS_2005 Kansas City Cardiomyopathy Questionnaire

New termgroups:

 LNC240_NEUROQOL_2010/LO
 LNC240_NEUROQOL_2010/OLC
 LNC240_NEUROQOL_2010/MTH_LO

New attributes:
# Field
Description Representation
47
COMMON_SI_TEST_RANK

Corresponding SI terms for 2000 common tests performed by laboratories in USA

MRSAT.ATN = "COMMON_SI_TEST_RANK"

New Classes
Class Description
MOLPATH.INV
Molecular Pathology
PANEL.PULM
Pulmonary order set
PANEL.SURVEY.CMS Centers for Medicare & Medicaid Services set
PANEL.SURVEY.EPDS
Edinburgh Postnatal Depression Scale set
PANEL.SURVEY.GNHLTH
General Healthy survey set
PANEL.SURVEY.HHS
Depart. Of Health and Human Services set
PANEL.SURVEY.MTLHLTH
Mental Health survey set
PANEL.SURVEY.NEURO
Neurological survey set
SURVEY.AAOS
Amer. Acad. Of Orthopaedic Surgeons survey
SURVEY.EPDS
Edinburgh Postnatal Depression Scale
SURVEY.GNHLTH
General Healthy survey
SURVEY.HHS
Depart. Of Health and Human Services survey
SURVEY.MTLHLTH
Mental Health survey
SURVEY.NEURO
Neurological survey


Source-Provided Files: Summary

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The complete LOINC distribution includes the following.

Documentation and Reference

File Name Description
LOINC_ReleaseNotes.txt Release notes, updated with each LOINC version
LOINCManual.pdf The complete documentation, including tables used to expand abbreviations

Data files

File Name Description
LOINCDB.TXT Primary LOINC data files
LOINC_MAP_TO.TXT Mappings between current and retired codes
LOINC_PARTS_V2-40_2012-06-28.txt Parts names and codes
LOINC_PART_LINKS_V2-40_2012-06-28.txt Part links, for relationships and hierarchy
LOINC_V240_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.

Not included:
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: Details

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Details on format of input files and representation of source data. Consult the LOINC documentation for additional details.

file:LOINCDB.TXT

# Field Description Representation
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.
  • First segment of colon-separated fully-specified name, MRCONSO.STR, TTY = "LN" or "LO"
  • First segment of colon-separated fully-specified name, MRCONSO.STR, TTY = "LX" or "OLX" (with expansions)
  • Subfield 1 = MRCONSO.STR, TTY = "CN"
  • MRCONSO.STR, TTY = "CX" (subfield 1, with expansions)
  • Entire field: MRSAT.ATN = LOINC_COMPONENT
3 PROPERTY
  • Second segment of colon-separated fully-specified name, MRCONSO.STR, TTY = "LN" or "LO"
  • Second segment of colon-separated fully-specified name, MRCONSO.STR, TTY = "LX" or "OLX" (with expansions)
  • MRSAT.ATN = LOINC_PROPERTY
4 TIME_ASPCT
  • Third segment of colon-separated fully-specifie name, MRCONSO.STR, TTY = "LN" or "LO"
  • Third segment of colon-separated fully-specified name, MRCONSO.STR, TTY = "LX" or "OLX" (with expansions)
  • MRSAT.ATN = LOINC_TIME_ASPECT
5 SYSTEM
  • Fourth segment of colon-separated fully-specified name, MRCONSO.STR, TTY = "LN" or "LO"
  • Fourth segment of colon-separated fully-specified name, MRCONSO.STR, TTY = "LX" or "OLX" (with expansions)
  • First subfield: MRCONSO.STR, TTY = "LS" (with expansions)
  • MRSAT.ATN = LOINC_SYSTEM
6 SCALE_TYP
  • Fifth segment of colon-separated fully-specified name, MRCONSO.STR, TTY = "LN" or "LO"
  • Fifth segment of colon-separated fully-specified name, MRCONSO.STR, TTY = "LX" or "OLX" (with expansions)
  • MRSAT.ATN = LOINC_SCALE_TYP
7 METHOD_TYP
  • Sixth segment of colon-separated fully-specified name, MRCONSO.STR, TTY = "LN" or "LO"
  • Sixth segment of colon-separated fully-specified name, MRCONSO.STR, TTY = "LX" or "OLX" (with expansions)
  • MRSAT.ATN = LOINC_METHOD_TYP
  • Used in the subsource assignment algorithm
8
CLASS Arbitrary classification of the terms for grouping related observations together. See Table 29 in the LOINC Users’ Guide for values.
  • MRCONSO.STR, TTY = "HS"
  • MRCONSO.STR, TTY = "HC" (with expansions)
  • MRSAT.ATN = "LCL"
  • Used to build hierarchy
  • Used in the subsource assignment algorithm
9 SOURCE Internal use only Not used
10 DATE_LAST_CHANGED Date last changed; format is YYYYMMDD MRSAT.ATN = "LLR"
11 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"
12 COMMENTS Free-text comments relating to the test result MRSAT.ATN = "SOS"
13 STATUS Status
Valid values are:
ACTIVE
DEPRECATED
DISCOURAGED
TRIAL
  • For records with STATUS = "DEPRECATED", an obsolete TTY is assigned, and MRCONSO.SUPPRESS = "O"
  • MRSAT.ATN = "LCS"
14 MAP_TO For codes with status = "DEPRECATED," or "DISCOURAGED," may contain the LOINC code of the new term that should be used
  • Used to create mapped_to relationships between "LN" and "LO" atoms
  • MRSAT.ATN = "LMP"
15 CONSUMER_NAME Consumer-friendly name for this term. Content is experimental (beta). MRSAT.ATN = "CONSUMER_NAME"
16 MOLAR_MASS Molecular weights, contributed by IUPAC MRSAT.ATN = "LMM"
17 CLASSTYPE 1 = Laboratory; 2 = Clinical class; 3 = Claims attachments; 4=Surveys
  • MRCONSO.STR, TTY = "HC"
  • MRCONSO.STR, TTY = "HS" (with expansions)
  • MRSAT.ATN = "LCN"
  • Used to build hierarchy
18 FORMULA Regression equation details MRSAT.ATN = "LFO"
19
SPECIES Indicates which non-human species this code applies to MRSAT.ATN = "LSP"
20
EXMPL_ANSWERS Examples of valid answers MRSAT.ATN = "LEA"
21 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
22
BASE_NAME Chemical base name from CAS MRSAT.ATN =  "LCB"
23 NAACCR_ID North American Association of Central Cancer Registries Identification Number MRSAT.ATN = "LNC"
24
CODE_TABLE Examples on CR0050 Cancer Registry MRSAT.ATN = "LNE"
25
SURVEY_QUEST_TXT Question from survey instrument MRSAT.ATN = "LQT"
26
SURVEY_QUEST_SRC Name of survey instrument and item/question number MRSAT.ATN = "LQS"
27
UNITSREQUIRED Y/N indicates whether units are required for OBX segment in a HIPAA attachment MRSAT.ATN = "LUR"
28
SUBMITTED_UNITS Moved to RELMA MRSAT.ATN = "LSU"
29
RELATEDNAMES2 Synonyms for each part of the fully-specified LOINC name (component, property, time, system, scale, method) MRSAT.ATN = "LRN2"
30
SHORTNAME Concatenation of the fully-specified LOINC name MRCONSO.STR, TTY = "OSN", "OOSN"
31
ORDER_OBS Defines term as an order only, observation only, both, or Subset MRSAT.ATN = "LOR"
32
CDISC_COMMON_TESTS Y indicates member of subset used by CDISC in clinical trials MRSAT.ATN = "LCD"
33
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_ID"
34
EXTERNAL_COPYRIGHT_NOTICE External copyright holder information MRSAT.ATN = "COPYRIGHT"

Used in the subsource assignment algorithm
35
EXAMPLE_UNITS Indicates representative units MRSAT.ATN = "EXAMPLE_UNITS"
36 LONG_COMMON_NAME Readable version of LOINC term MRCONSO.ATN = "LC, OLC"
37
HL7_V2_DATATYPE HL7 version 2.x datatype MRSAT.ATN = "HL7_V2_DATATYPE"
38
HL7_V3_DATATYPE HL7 version 3.0 datatype MRSAT.ATN = "HL7_V3_DATATYPE"
39
CURATED_RANGE_AND_UNITS List of normal ranges and associated units MRSAT.ATN = "CURATED_RANGE_AND_UNITS"
40
DOCUMENT_SECTION Classification of whether this code can be used as a full document, section of a document, or both MRSAT.ATN = "DOCUMENT_SECTION"
41 EXAMPLE_UCUM_UNITS Example units of measure expressed as UCUM units MRSAT.ATN = "EXAMPLE_UCUM_UNITS"
42
EXAMPLE_SI_UCUM_UNITS Not currently populated
not applicable
43
STATUS_REASON
Classification of the reason for concept status. This field will be Null for ACTIVE concepts, and optionally populated for terms in other status where the reason is clear. DEPRECATED or DISCOURAGED terms may take values of: AMBIGUOUS, DUPLICATE, or ERRONEOUS MRSAT.ATN = "STATUS_REASON"
44
STATUS_TEXT
Explanation of concept status in narrative text. This field will be Null for ACTIVE concepts, and optionally populated for terms in other status. MRSAT.ATN = "STATUS_TEXT"
45
CHANGE_REASON_PUBLIC
Detailed explanation about special changes to the term over time.
MRSAT.ATN = "CHANGE_REASON_PUBLIC"
46
COMMON_TEST_RANK
Numeric ranking of approximately 2,000 common tests performed by hospitals. MRSAT.ATN = "COMMON_TEST_RANK"
47
COMMON_SI_TEST_RANK
Corresponding SI terms for 2000 common tests performed by laboratories in USA. MRSAT.ATN = "COMMON_SI_TEST_RANK"
48
COMMON_ORDER_RANK
Ranking of approximately 300 common orders performed by laboratories in the USA.
MRSAT.ATN = "COMMON_ORDER_RANK"

file:LOINC_MAP_TO

# Field Representation
1 LOINC Obsolete LNC code.
Used to create relationships between "LO" and "LN" atoms.
The REL= RQ;
The RELA=mapped_from/mapped_to.

2 COMMENT Current LNC code.

file:LOINC_PARTS

# Field Representation
1 L_PART_ID MRCONSO.CODE

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'

4 DISPLAY_NAME
  • MRCONSO.STR, TTY = "LPDN" (only "DISPLAY_NAME" values that contain the pattern "Allergen Mix" are included as LPDN atoms
  • MRSAT.ATN = "SOS"
5 SHORT_NAME_MIXED_CASE Not used

file:LOINC_PART_LINKS

# Field Description Representation
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:

PART_TYPE RELA/inverse_RELA
ADJUSTMENT has_adjustment adjustment_of
CHALLENGE has_challenge challenge_of
CLASS has_class class_of
COMPONENT has_component component_of
DIVISORS has_divisor divisor_of
FRAGMENTS FOR SYNONYMS has_fragments_for_synonyms fragments_for_synonyms_of
METHOD has_method method_of
PROPERTY has_property property_of
SCALE has_scale scale_of
SUFFIX has_suffix suffix_of
SUPERSYSTEM has_supersystem supersystem_of
SYSTEM has_system system_of
TIME has_time_aspect time_aspect_of
TIME MONITOR has_time_monitor time_monitor_of

Note: No PARTS with PART TYPEs of "COUNT," "MULTI-AXIAL" and "SUPERSYSTEMMULTI-AXIAL"
appear in the current "LOINC_PART_LINKS" file, therefore no relationships are created for those PART TYPE values.

2 L_PART_ID LOINC PART CODE
3 LINK_TYPE Value is always "1" Not processed

file:LOINC_MUTLI-AXIAL_HIERARCHY

# Field Representation
1 PATH_TO_ROOT Used to create the hierarchy tree under the " LOINCPARTS" concept
2 SEQUENCE Not used
3 IMMEDIATE_PARENT Not used
4 CODE The identifier of the "child" concept; all end nodes are LOINC IDs; ancestors are LOINC PARTs
5 CODE_TEXT Not used