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loinc external identifier

loinc_ext_id
general
Updated 3/30/2026

Definition

The external system reference id for a logical observation identifiers names and codes. Used as a unique reference to identify and track the loinc across healthcare systems. This field is commonly used in electronic health records (EHR), healthcare information systems (HIS), and clinical data warehouses for loinc management and reporting.

Standard Abbreviation

loinc_ext_id

Category

general

Database Usage

-- Example column naming
CREATE TABLE claims (
  claim_id VARCHAR(50),
  loinc_ext_id VARCHAR(100),  -- loinc external identifier
  ...
);

-- Example in SELECT
SELECT 
  claim_id,
  loinc_ext_id as loinc_external_identifier
FROM claims;

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