Per VHA Directive, this file has been 'locked down' by Data Standardization (DS). The file definition (i.e. data dictionary) shall not be modified. All additions, changes and deprecation to entries in this file shall be done by Enterprise Reference Terminology (ERT) using the Master File Server (MFS), provided by the Common Services (CS). Creating and/or editing locally defined fields in the file are not permitted. Use of locally defined fields that were created prior to the VHA's effective Directive shall not be supported. The LAB LOINC file contains an extraction of the LOINC database. The LOINC database provides sets of universal names and ID codes for identifying laboratory and clinical test results. The LAB LOINC file is used to map the Laboratory WKLD CODE file(#64), also known as the National Laboratory Test file, to LOINC codes. This file is a standard file distributed by Dallas CIOFO and should not be edited locally. Copyright acknowledgement LOINC was Copyrighted 1995,1996,1997, by Regenstrief Institute and the Logical Observation Identifier Names and Codes (LOINC) Committee. All rights reserved. LOINC is a trademark of the Regenstrief Institute. LOINC c/o Regenstrief Institute 1001 West 10th. Street, RHC-5 Indianapolis, Indiana 46202 USA The Department of Veterans Affairs abides by all copyright restrictions, condition and LOINC code use. Permission was granted, without written agreement and without license or royalty fees, to use, copy, or distribute the LOINC codes, LOINC User's Guide, and the contents of the LOINC database for any purpose, so long as this copyright notice appears on any copies of the LOINC database and Users' Guide, and that the following conditions are met. The Department of Veterans Affairs agrees to the following conditions: 1. Will not change the meanings of any of the LOINC codes. 2. Will not change any content in the defined LOINC fields. 3. Will include this notice of copyright and terms in any copies of the LOINC database distributed. 4. If new records are added to the LOINC database as distributed to deal with local requirements, these records will be assigned a LOINC code containing a leading alphabetic "X" so that the new term cannot be confused with new LOINC codes as they are assigned by the LOINC committee. 5. Incorporation of any part of the LOINC database into another laboratory test definition database for distribution outside of their corporation must include the LOINC code (field #1) all six names fields (#2-7), the related terms field (#8), and the answer list field (#19), and include this copyright notice on the electronic document that incorporates the LOINC database. Regenstrief Institute and members of the LOINC Consortium do not accept liability for any omissions or errors in the LOINC database, and all EXPRESS AND IMPLIED WARRANTIES, INCLUDING THOSE RELATED TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
.01code(+)0;1NUMERICBThe unique LOINC code in numeric form.
1component0;2POINTER95.31CThe name of the component or analyte measured e.g., potassium, hemoglobin, or hepatitis C antigen.
1.5challenge0;3POINTER64.061This field contains information necessary to interpret "challenge" (or loading or tolerance) tests.
1.6adjustment0;4POINTER64.061This field contains calculations that adjust or correct some measured value.
1.7non-patient specimen0;5POINTER64.061The second subpart of the system distinguishes observations on the patient (or samples taken from the patient or donor) from observations on non-patient materials that relate to the patient, e.g. a blood product unit (BPU). When the person or super system is not included in a name, it can be assumed to be the patient.
2property0;6POINTER64.061This field contains the property measured- e.g., a mass concentration or enzyme activity.
3time aspect0;7POINTER64.061Point or moment in time vs. time interval, e.g., 24-hour urine.
3.1time modifier0;17POINTER64.061The second and optional subpart of the time component allows an indication of some sub selection or integration of the measures taken over the defined period of time, so 8H^MAX heart rate would be the highest heart rate observed over 8H(Shift), MIN, MAX, FIRST, LAST, MEAN are the other possible values for this subpart. When nothing is stored in this subpart, we assume a mean value over the time period in question.
4system0;8POINTER64.061This field contains the specimen.
5scale type0;9POINTER64.061The field contains the data part of the test name which specifies the scale of the measure, and is a required part. The abbreviation of the type of scale (previously called precision), should be used in the fully specified name.
6method type0;10POINTER64.2The method by which the test was performed. Methods need only be expressed as part of the name when they provide a distinction between tests that measure the same component (analyte) but which have different clinical significance or have different clinical reference ranges. For instance, whole blood glucose tested with a chemstrip might be distinguished in the method field.
7class0;11POINTER64.061An arbitrary classification of the terms for grouping related observations together. Some examples are CHEM for Chemistry, MICRO for Microbiology, and BLDBK for Blood Bank.
8source0;12FREE TEXTSource is a field for internal use of the LOINC committee.
10units0;14POINTER64.061This field contains the units of measure for the test of this specimen.
11normal range0;13FREE TEXTNormal Range - Example answers from real tests.
13molar mass0;16FREE TEXTMolecular weights: This field contains the molecular weights of chemical moieties when they are provided to LOINC. This release contains values kindly contributed by IUPAC.
15check digit0;15NUMERICNote: the data contained in this field contains some incorrect values due to errors in LOINC released database. When check digit computation errors are discovered - STATUS (#20) field is marked as DEL preventing the code from being assigned. Once a LOINC has be released it never deleted from the database. This field contains the LOINC number modulo 10 check digit. The instruction for calculating a Mod 10 check digit is as follows: (1) Take the odd digit positions counting from the right (2) Multiply by 2 (3) Take the even digits starting from the right (4) Append these to the front of the results of (2) (5) Add the digits of (4) together (6) Find the next highest multiple of 10 (7) Subtract (5) from (6)
20status4;1SET OF CODES1:DEL
ADDeprecated or superseded status indicated by DEL in this field (otherwise blank). Used to mark terms as the database evolves. LOINC codes will never be reused nor will they be removed from the database, they will instead be cross-referenced to superseding terms in the MAP_TO field.
21map to4;2POINTER95.3Used when a field has been dropped from the active database (by entering "DEL" in the Status field) because it has been replaced by an updated term. In those cases, Map_To contains the LOINC code of the new term that should be used.
22date last changed4;3DATE-TIMEDate last changed, in the format YYYYMMDD.
23change type4;4FREE TEXTChange Type Code. DEL= Delete; 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.
24change reason4;5FREE TEXTReason term was changed. If a term has been changed, the reason for the change is detailed here.
30euclides code1;1FREE TEXTEUCLIDES analyte code. The Euclides code identifies the analyte (the first subpart of the first part of the name.)
31astm code1;2FREE TEXTThe ASTM codes apply to only a few of the tests (e.g., cell counts, antibiotic sensitivities). These are the codes included in the appendices of HL7 and ASTM E1238-94.
32iupac code1;3FREE TEXTThe IUPAC code identifies the component, kind of property, and system.
33snomed code1;4FREE TEXTSNOMED Code (future versions). Not currently used.
34va code1;5FREE TEXTACThis field contains the VA Unique Identifier (VUID). This number is assigned by the VA Master File Server (MFS).
35metpath code1;6FREE TEXTMetpath Code. Not currently used.
36hcfa code1;7FREE TEXTHCFA code (future versions). Not currently used.
37cdc code1;8FREE TEXTCode from the CDC Complexity file which maps laboratory tests to the instruments used to perform them. These codes are at the analyte level, not the test instrument level.
38gpi code1;9FREE TEXTGPI Code. For drugs, this field contains a map to the Medispan GPI codes, a hierarchical system of classifying pharmaceutical products.
40iupac analyte code1;11FREE TEXTIUPAC analyte code: This field contains the Chemical Abstract service number or the Enzyme Nomenclature number for the chemical components for chemicals and/or enzymes. These were also contributed by IUPAC.
This field is used to indicate the source of this code. There are at least four general areas. Laboratory Class, Clinical Class, Claims Attachment and Surveys. The selections are available on the Regenstrief RELMA class restriction window.
50related names50;0MULTIPLE95.39A synonym intended to make it easier to find a given observation by providing other names by which the observation may be known. For a drug level, for example, we include the trade names of that drug under the related names.
56units required0;18SET OF CODES1:YES
This field indicates that units are required when this LOINC code is included in an OBX segment in a HIPPA attachment.
60answerlist2;0MULTIPLE95.33The list of answers for results that are reportable from a multiple choice list (e.g., the answers for the term of DISPOSITION OF BLOOD PACK are GIVEN; PARTIALLY GIVEN;DISCARDED). The field provides examples, not required answer lists.
80fully specified name80;1FREE TEXTThis field contains the fully specified name of the LOINC code. It has five or six major parts including: the name of the component or analyte measured, the property observed, the timing of the measurement, the type of sample, the scale of measurement, and where relevant, the method of the measurement. The colon character, ":", is part of the name and is used to separate the main parts of the name.
81shortname81;1FREE TEXTEThis field was introduced in LOINC version 2.07, the field is a concatenation of the fully specified LOINC name. This field maybe used as the test name on reports rather than the fully specified name in FULLY SPECIFIED NAME (#80) field.
99comments99;0WORD-PROCESSINGFree-text comments relating to the test result.
99.98master entry for vuid(+)VUID;2BOOLEAN1:YES
This field identifies the Master entry for a VUID associated with a Term/Concept.
99.99vuid(+)VUID;1FREE TEXTVHA Unique ID (VUID). A unique meaningless integer assigned to reference terms VHA wide.
99.991effective date/timeTERMSTATUS;0MULTIPLE95.3099Describes the pair Status and Effective Date/Time for each reference term.

Referenced by 2 types

  1. WKLD CODE (64) -- default loinc code
  2. LAB LOINC (95.3) -- map to