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observation onset date

obs_onset_dt
general
Updated 3/30/2026

Definition

The symptom start date for a clinical finding or measurement. Used to track temporal information related to observation onset date. This field is commonly used in electronic health records (EHR), healthcare information systems (HIS), and clinical data warehouses for observation management and reporting.

Standard Abbreviation

obs_onset_dt

Category

general

Database Usage

-- Example column naming
CREATE TABLE claims (
  claim_id VARCHAR(50),
  obs_onset_dt VARCHAR(100),  -- observation onset date
  ...
);

-- Example in SELECT
SELECT 
  claim_id,
  obs_onset_dt as observation_onset_date
FROM claims;

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