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--- documentation:vocabulary:loinc [2015/10/11 22:00] – [Domains] cgreich
+++ documentation:vocabulary:loinc [2024/09/03 11:19] (current) – jcruz
@@ Line 1: / Line 1: @@
 ===== LOINC =====
-LOINC is a coding system for lab tests, but also for surveys, tests and other clinical procedures or activities that create a result, usually for a diagnostic purpose.
+Thank you for visiting the wiki! This page has moved to https://github.com/OHDSI/Vocabulary-v5.0/wiki/Vocab.-LOINC
-==== Sources ====
-All LOINC source information is obtained from the LOINC websites that is supported by the Regenstrief institute, except the mapping between LOINC and CPT4, which is provided by the NLM:
-Generic LOINC Concept
-  - LOINC Multiaxial Hierarchy
-  - LOINC Forms and LOINC Answers
-  - LOINC Panel
-  - LOINC Class
-  - LOINC to CPT mapping
-  - LOINC to SNOMED mapping
-==== Standard Concepts ====
-All LOINC Concepts are Standard Concepts, while Concepts of the Source LOINC Class, LOINC Hierarchy are Classification Concepts.
-==== Concept Classes  ====
-Concepts in the LOINC vocabulary are assigned Concept Class as following:
-^Source^Resourced^Concept Class^Description^
-|LOINC|CLASSTYPE=1|Lab Test|The Universal Lab Order Codes Value Set contains the most frequent lab orders|
-| |CLASSTYPE=2|Clinical Observation|Anything that can be tested, measured, or observed about a patient without removing a specimen|
-| |CLASSTYPE=3|Claims Attachment|Information necessary to adjudicate claims for ambulance, rehabilitation, or emergency room services|
-| |CLASSTYPE=4|Survey|Set of questions on a survey or form|
-| |CLASS|LOINC Class|Similar to the Concept Classes of each LOINC Concept, but more detailed and hierarchical|
-|LOINC Hierarchy|CODE|LOINC Hierarchy|Similar to LOINC Class, but separate hierarchical system|
-|LOINC Answer|AnswerStringID|Answer|Observation result value as an answer to a LOINC Concept|
-==== Domains ====
-LOINC Concepts can have a Measurement or Observation Domain. This is assigned as following:
-^Source^Depending on ^Domain^
-|LOINC|CLASSTYPE=1 or 2|Measurement|
-| |CLASSTYPE=3 or 4|Observation|
-|LOINC Hierarchy|Concept_code>'LP76352-1'|Observation|
-| |Concept_code>='LP76352-1'|Measurement|
-|LOINC Class|Manual|Observation or Measurement|
-|LOINC Answer| |Meas Value|
-==== Relationships ====
-Relationships are defined within LOINC and between LOINC and CPT and LOINC and SNOMED:
-=== Internal LOINC relationships ===
-  - "Is a" relationships between LOINC Concepts and LOINC Hierarchy and LOINC Class Concepts
-  - "Has Answer" relationships between LOINC Concepts and LOINC Answer Concepts
-  - "Panel contains" relationships between LOINC Concepts
-=== LOINC to SNOMED relationships ===
-These relationships are defined as "LOINC - SNOMED eq" between "LOINC Hierarchy" Concepts and SNOMED Concepts representing the entity that is measured. Note that only a small fraction (1% as of late 2015) are currently mapped. Also, note that some of the mappings seem to confuse the testing for drugs with the drugs themselves.
-=== LOINC to CPT relationships ===
-These relationships are defined as "LOINC - CPT4 eq" between LOINC Lab Test Concepts and SNOMED Concepts. Note that only a small franction (2% as of late 2015) are mapped.
-=== Hierarchy ===
-All internal "Is a" and "Panel contains" relationships participate in the creation of the CONCEPT_ANCESTOR table, creating an internal hierarchy within LOINC not connected to the larger Measurement or Observation Domain space.