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history external identifier

hx_ext_id
general
Updated 3/30/2026

Definition

The external system reference id for a past medical events. Used as a unique reference to identify and track the history across healthcare systems. This field is commonly used in electronic health records (EHR), healthcare information systems (HIS), and clinical data warehouses for history management and reporting.

Standard Abbreviation

hx_ext_id

Category

general

Database Usage

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

-- Example in SELECT
SELECT 
  claim_id,
  hx_ext_id as history_external_identifier
FROM claims;

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