Common LOINC Laboratory Observation Codes

Mapping your local laboratory test codes to LOINC can seem like a daunting task at first.

Don't worry. To help you get started, we've created an empirically-based list of the most common LOINC result codes. Knowing that relatively few codes account for much of the typical lab result volume, we think that this Top 2000+ list will be an excellent starter set.

It contains just over 2000 LOINC codes that represent about 98% of the test volume carried by three large organizations that mapped all of their lab tests to LOINC codes.

The LOINC Top 2000+ Lab Observations list is available in two varieties:

  • US Version: For those who favor reporting in mass units (e.g. mg/dL)
  • SI Version: For those who favor reporting in molar units (e.g. mmol/L)

%

Put the Pareto Principle to work for you. These LOINC codes represent the vast majority of test volume.

TIP Use the included Mapper's Guide for advice and guidance about which codes to choose for a given purpose.

These files do not include any deprecated terms.

LOINC Top 2000+ Lab Observations and Mapper's Guide

Please log in to your LOINC account to download these files. If you do not have a LOINC account, please complete our free registration.

FormatNameVersionReleasedSize

PDF
LOINC Top 2000+ Lab Observations and Mapper's Guide - Introduction (.pdf)
Background document describing the origins, development, and organization of the LOINC Mapper's Guide to the Top 2000+ Lab Observations.

Translations: Chinese

1.6 2017-06-23 422 KB

US Version

Please log in to your LOINC account to download these files. If you do not have a LOINC account, please complete our free registration.

FormatNameVersionReleasedSize

PDF
LOINC Mapper's Guide to the Top 2000+ Lab Observations - US Version (.pdf)
Document containing mapping guidance for the LOINC Top 2000+ Lab Observations. OID: 1.3.6.1.4.1.12009.10.2.3
1.6 2017-06-23 1 MB

XLSX
LOINC Mapper's Guide to the Top 2000+ Lab Observations - US Version (.xlsx)
Document containing mapping guidance for the LOINC Top 2000+ Lab Observations. OID: 1.3.6.1.4.1.12009.10.2.3
1.6 2017-06-23 317 KB

CSV
LOINC Top 2000+ Lab Observations - US Version (.csv)
The list of LOINC Top 2000+ Lab Observations in a simple CSV file. Does NOT contain mapping guidance. OID: 1.3.6.1.4.1.12009.10.2.3
1.6 2017-06-23 203 KB

SI Version

Please log in to your LOINC account to download these files. If you do not have a LOINC account, please complete our free registration.

FormatNameVersionReleasedSize

PDF
LOINC Mapper's Guide to the Top 2000+ Lab Observations - SI Version (.pdf)
Document containing mapping guidance for the LOINC Top 2000+ Lab Observations. OID: 1.3.6.1.4.1.12009.10.2.4
1.6 2017-06-23 1 MB

XLSX
LOINC Mapper's Guide to the Top 2000+ Lab Observations - SI Version (.xlsx)
Document containing mapping guidance for the LOINC Top 2000+ Lab Observations. OID: 1.3.6.1.4.1.12009.10.2.4

Translations: Chinese

1.6 2017-06-23 344 KB

CSV
LOINC Top 2000+ Lab Observations - SI Version (.csv)
The list of LOINC Top 2000+ Lab Observations in a simple CSV file. Does NOT contain mapping guidance. OID: 1.3.6.1.4.1.12009.10.2.4
1.6 2017-06-23 205 KB
 

Use the Top 2000+ Rank in the LOINC Table or RELMA too

The Top 2000+ LOINC terms have their relative rank stored in the COMMON_TEST_RANK field of the LOINC table, which is handy if you're working directly with that file. Also, the RELMA software has a "common lab tests only" filter that will limits searches to return only codes in this common test list. It's pretty cool. Give it a try when you fire up RELMA.