Skip Navigation Bar
 

Unified Medical Language System® (UMLS®)

2010AA LOINC Source Information




Skip to: Atoms, Attributes, Definitions, Relationships, Mappings

VSABs:

  • LNC229
  • LNC229_BRADEN_1988
  • LNC229_CAM_2003
  • LNC229_FLACC_1997
  • LNC229_MDS20
  • LNC229_MDS30
  • LNC229_OASIS_2002
  • LNC229_PHQ_9_1999
  • LNC229_RHO_2008
  • LNC229_WHO_2006

Notes:
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 apply to elements from all subsources.

Summary of Changes:

Changes since LNC227

LNC_MDS was removed:

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.

Three subsources were added:

  • LNC_CAM:
    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.
  • LNC_MDS20
  • LNC_MDS30
    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.

New Termtype: OLC

Obsolete Long Common Name (SUPPRESS = O). Previously, all atoms created from field 46, LONG_COMMON_NAME, were represented with TTY = LC.

Seven new classes were added

ClassDescription
DOC.QUALITYQuality documents
EYE.OCTOphthalmology Optical Coherence Tomography (OTC)
PANEL.DOCDocuments panels
PANEL.EYEOphthalmology panels
PANEL.PHENXPhenX Panel
PHENXPhenX
PUBLICHEALTHPublic Health

Original Files:

The UMLS uses files publically available at www.loinc.org, including: "LOINCDB.TXT" (compressed in "LOINCTAB.zip") and "LOINC_V229_MULTI-AXIAL_HIERARCHY.CSV" (compressed in "LOINC_V229_MULTI-AXIAL_HIERARCHY.zip"). In addition, the UMLS receives two files to facilitate building the hierarchy. For 2.29, these files were: "LOINC_PART_LINKS_V2-29_2009-12-30.txt" and "LOINC_PARTS_V2-29_2009-12-30.txt." Additional information, such as expansions of abbreviations, is extracted from LOINCManual.pdf.

Overview


Identifiers

LOINC Identifiers in the UMLS are generally based on field 1 of LOINCDB.TXT (LOINC_NUM), or field 1 of LOINC_PARTS (L_PART_ID). For some termtypes, the atom may be associated with multiple LOINC entities. For example, a component may be a part of multiple fully-specified names. In these cases, the atom (e.g. a CN, or Official Component Name), is assigned an MTHU# during Metathesaurus source processing.

  • CODE:
    • For termtypes LC, LN, LO, LX, OLX, OSN, OOSN: the LOINC _NUM (field 1) from LOINCDB.TXT
    • For termtypes LPN, LPDN: the L_PART_ID (field 1) from LOINC_PARTS_*.txt
    • For termtypes CN, CX, HC, HS, LS, SN, SX: an MTHU#, assigned during Metathesaurus source processing.
  • SAUI: Not Applicable
  • SCUI: Not Assigned
  • SDUI: Not Applicable

Expansions

Expanded forms of certain atoms are created during Metathesaurus source processing by applying abbreviation expansions extracted from the LOINC Manual. In these cases, the expanded form is generally assigned the same identifier as its original form. Expansions may also include converting patterns such as "little e" or “super little b" to “e" or "^b" respectively.


Atoms

 (return to top)
TTYORIGIN
CNOfficial component name:
CODE = MTHU#, assigned during Metathesaurus source processing; same as CODE for respective CX, SN and SX as applicable.
STR = LOINCDB.TXT field 2, subfield 1 (COMPONENT).
CXComponent, with abbreviations expanded:
CODE = MTHU#, assigned during Metathesaurus source processing; same as CODE for respective CN, SN and SX as applicable.
STR = Expanded form of LOINCDB.TXT field 2, subfield 1 (COMPONENT).
HCHierarchical class:
CODE = MTHU#, assigned during Metathesaurus source processing (same as CODE for respective HS).
STR = expanded form of LOINCDB.TXT field 9 for CLASS or expanded form of LOINCDB.TXT field 23 for CLASSTYPE.
An additional HC atom, “LOINCCLASSTYPES,” is added during Metathesaurus source processing as a hierarchical placeholder.
HSShort or alternate version of hierarchical term:
CODE = MTHU#, assigned during Metathesaurus source processing (same as CODE for respective HC).
STR = value of LOINCDB.TXT field 9 for CLASS, or value of LOINCDB.TXT field 23 for CLASSTYPE.
LCLong common name:
CODE = LOINCDB.TXT field 1 (LOINC_NUM)
STR = LOINCDB.TXT field 46 (LONG_COMMON_NAME)
LNOfficial fully-specified name:
CODE = LOINCDB.TXT field 1 (LOINC_NUM)
STR = LOINCDB.TXT fields 2-7, concatenated with colons, i.e. F2:F3:F4:F5:F6:F7
LOObsolete official fully specified name:
CODE = LOINCDB.TXT field 1 (LOINC_NUM)
STR = LOINCDB.TXT fields 2-7, concatenated with colons, i.e. F2:F3:F4:F5:F6:F7, if field 15 = “DEL”.
LPDNParts display name:
CODE = LOINC_PARTS_*.txt field 1 (L_PART_ID)
STR = LOINC_PARTS_*.txt field 4 (DISPLAY_NAME)
LPDN atoms are only created for strings containing the pattern “Allergen Mix.”
LPNParts name:
CODE = LOINC_PARTS_*.txt field 1 (L_PART_ID)
STR = LOINC_PARTS_*.txt field 3 (NAME_CASE_INSENSITIVE)
An additional LPN, “LOINCPARTS,” is added during Metathesaurus source processing as a hierarchical placeholder.
LSExpanded system/sample type:
CODE = MTHU#, assigned during Metathesaurus source processing
STR = Expanded form of LOINCDB.TXT field 5, subfield 1 (SYSTEM).
LXExpanded obsolete fully specified name:
CODE = LOINCDB.TXT field 1 (LOINC_NUM)
STR = Expanded form of LOINCDB.TXT fields 2-7, concatenated with colons, i.e. F2:F3:F4:F5:F6:F7, if field 15 is not = “DEL”.
OLCObsolete long common name:
CODE = LOINCDB.TXT field 1 (LOINC_NUM)
STR = LOINCDB.TXT field 46 (LOINC_COMMON_NAME)
SUPPRESS = O
TTY = OLC is assigned if field 15 (STATUS) = “DEL”
OLXExpanded obsolete fully specified name:
CODE = LOINCDB.TXT field 1 (LOINC_NUM)
STR = Expanded form of LOINCDB.TXT fields 2-7, concatenated with colons, i.e. F2:F3:F4:F5:F6:F7, if field 15 = “DEL”.
OOSNObsolete official short name:
CODE = LOINCDB.TXT field 1 (LOINC_NUM)
STR = LOINCDB.TXT field 39 (SHORTNAME), if field 15 = “DEL”.
OSNOfficial short name:
CODE = LOINCDB.TXT field 1 (LOINC_NUM)
STR = LOINCDB.TXT field 39 (SHORTNAME), if field 15 is not = “DEL”.
SNOfficial component synonym:
CODE = MTHU#, assigned during Metathesaurus source processing. Same as code for respective CN, CX and SX as applicable.
STR = LOINCDB.TXT field 21 (EXACT_CMP_SY)
SXMixed-case component synonym with expanded abbreviations:
CODE = MTHU#, assigned during Metathesaurus source processing. Same as code for respective CN, CX and SN as applicable.
STR = Expanded form of LOINCDB.TXT field 21 (EXACT_CMP_SY).
XMCross-mapping set:
This data is added during Metathesaurus source processing

Attributes

 (return to top)
ATN [Description]Origin
COPYRIGHTLOINCDB.TXT field 43 (EXTERNAL_COPYRIGHT_NOTICE)
CURATED_RANGE_AND_UNITSLOINCDB.TXT field 49 (CURATED_RANGE_AND_UNITS)
DEFINITION_DESCRIPTION_HELPLOINCDB.TXT field 51
DOCUMENT_SECTIONLOINCDB.TXT field 50
EXAMPLE_UCUM_UNITSLOINCDB.TXT field 52
EXAMPLE_UNITSLOINCDB.TXT field 44
FROMRSABThis data is added during Metathesaurus source processing
FROMVSABThis data is added during Metathesaurus source processing
HL7_FIELD_SUBFIELDLOINCDB.TXT field 42
HL7_V2_DATATYPELOINCDB.TXT field 47
HL7_V3_DATATYPELOINCDB.TXT field 48
INPC_PERCENTAGELOINCDB.TXT field 45
LAL [Answerlist]LOINCDB.TXT field 14 (ANSWERLIST)
LCA [ACSSYM]LOINCDB.TXT field 27 (ACSSYM)
LCB [Chemical base name]LOINCDB.TXT field 28 (BASE_NAME)
LCD [CDISC common tests]LOINCDB.TXT field 41
LCL [Class]LOINCDB.TXT field 9
LCN [Classtype]LOINCDB.TXT field 23
LCS [Status]LOINCDB.TXT field 15
LCT [Change type]LOINCDB.TXT field 12
LEA [Example answers]LOINCDB.TXT field 26
LFO [Formula]LOINCDB.TXT field 24
LLR [Date last revised]LOINCDB.TXT field 11
LMM [Molecular weights]LOINCDB.TXT field 22
LMP [Map to code]LOINCDB.TXT field 16
LNC [NAACCR ID]LOINCDB.TXT field 30
LNE [Code table]LOINCDB.TXT field 31
LOINC_COMPONENTLOINCDB.TXT field 2 (all subfields)
LOINC_METHOD_TYPLOINCDB.TXT field 7
LOINC_PROPERTYLOINCDB.TXT field 3
LOINC_SCALE_TYPLOINCDB.TXT field 6
LOINC_SYSTEMLOINCDB.TXT field 5
LOINC_TIME_ASPECTLOINCDB.TXT field 4
LOR [Order/observation]LOINCDB.TXT field 40
LPL [Panel elements]LOINCDB.TXT field 33
LQS [Survey question source]LOINCDB.TXT field 35
LQT [Survey question text]LOINCDB.TXT field 34
LRF [Reference]LOINCDB.TXT field 20
LRN [Related name]LOINCDB.TXT field 8
LRN2 [Related names 2]LOINCDB.TXT field 38
LSP [Species]LOINCDB.TXT field 25
LSU [Submitted units]LOINCDB.TXT field 37
LUR [Units required]LOINCDB.TXT field 36
MAPSETRSABThis data is added during Metathesaurus source processing
MAPSETTYPEThis data is added during Metathesaurus source processing
MAPSETVERSIONThis data is added during Metathesaurus source processing
MAPSETVSABThis data is added during Metathesaurus source processing
MTH_MAPFROMCOMPLEXITYThis data is added during Metathesaurus source processing
MTH_MAPFROMEXHAUSTIVEThis data is added during Metathesaurus source processing
MTH_MAPSETCOMPLEXITYThis data is added during Metathesaurus source processing
MTH_MAPTOCOMPLEXITYThis data is added during Metathesaurus source processing
MTH_MAPTOEXHAUSTIVEThis data is added during Metathesaurus source processing
SOSLOINCDB.TXT field 13
LOINC_PARTS field 4 (DISPLAY_NAME)
TORSABThis data is added during Metathesaurus source processing
TOVSABThis data is added during Metathesaurus source processing
XMAPThis data is added during Metathesaurus source processing
XMAPFROMThis data is added during Metathesaurus source processing
XMAPTOThis data is added during Metathesaurus source processing

Definitions

 (return to top)

There are no text definitions for LOINC or LOINC subsources


Relationships

 (return to top)
RELRELA
inverse_RELA
Origin
CHD
PAR
SIB
The hierarchy is extracted from:
  • LOINCDB.txt, field 9 (CLASS) and field 23 (CLASSTYPE)
  • LOINC_V229_MULTI-AXIAL_HIERARCHY.CSV
RO analyzed_by
analyzes
Connects LS to LN or LO
ROassociated_withConnects CN to LO or LX with CLASSTYPE of 3 (Claims Attachment).
ROhas_adjustment
adjustment_of
Connects LPN where PART_TYPE = "ADJUSTMENT" with LN or LO, as per LOINC_PART_LINKS_*.txt
ROhas_challenge
challenge_of
Connects LPN where PART_TYPE = "CHALLENGE" with LN or LO, as per LOINC_PART_LINKS_*.txt
ROhas_class
class_of
Connects LPN where PART_TYPE = "CLASS" with LN or LO, as per LOINC_PART_LINKS_*.txt
ROhas_component
component_of
Connects LPN where PART_TYPE = "COMPONENT" with LN or LO, as per LOINC_PART_LINKS_*.txt
ROhas_divisor
divisor_of
Connects LPN where PART_TYPE = "DIVISORS" with LN or LO, as per LOINC_PART_LINKS_*.txt
ROhas_evaluation
evaluation_of
Connects CN to LO or LX with CLASSTYPE of 4 (Surveys).
ROhas_fragments_for_synonyms
fragments_for_synonyms_of
Connects LPN where PART_TYPE = "FRAGMENTS FOR SYNONYMS" with LN or LO, as per LOINC_PART_LINKS_*.txt
ROhas_method
method_of
Connects LPN with PART_TYPE = "METHOD" with LOINC CODE indicated in LOINC_PART_LINKS_*.txt
ROhas_property
property_of
Connects LPN where PART_TYPE = "PROPERTY" with LN or LO, as per LOINC_PART_LINKS_*.txt
ROhas_scale
scale_of
Connects LPN where PART_TYPE = "SCALE" with LN or LO, as per LOINC_PART_LINKS_*.txt
ROhas_suffix
suffix_of
Connects LPN where PART_TYPE = "SUFFIX" with LN or LO, as per LOINC_PART_LINKS_*.txt
ROhas_supersystem
supersystem_of
Connects LPN where PART_TYPE = "SUPER SYSTEM" with LN or LO, as per LOINC_PART_LINKS_*.txt
ROhas_system
system_of
Connects LPN where PART_TYPE = "SYSTEM" with LN or LO, as per LOINC_PART_LINKS_*.txt
ROhas_time_aspect
has_time_aspect
Connects LPN where PART_TYPE = "TIME" with LN, as per LOINC_PART_LINKS_*.txt
ROhas_time_modifier
time_modifier_of
Connects LPN where PART_TYPE = "TIME MODIFIER" with LN, as per LOINC_PART_LINKS_*.txt
ROmeasured_by
measures
Connects CN to LO or LX with CLASSTYPE of 1 (Laboratory) or 2 (Clinical).
RQmapped_from
mapped_to
Connects an LO with an LN, indicating possible synonymy between a current code and a retired code, as per LOINCDB.TXT field 12
SYcommon_name_of
has_common_name
Connects an LN or LO with its LC or OLC respectively
SYexpanded_form_of
has_expanded_form
Connects original and expanded forms of atoms, including: SX <--> SN; CN <--> CX; LN <--> LX; OLX <--> LO; OSN <--> LN; OOSN <--> LO

Mappings

 (return to top)

The Metathesaurus includes mappings between LOINC 2.15 and CPT2005.