diagnosis onset date

diag_onset_dt

general

Updated 3/30/2026

Definition

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

Standard Abbreviation

diag_onset_dt

Database Usage

-- Example column naming
CREATE TABLE claims (
  clm_id VARCHAR(50),
  diag_onset_dt DATE,  -- diagnosis onset date (date only, no time)
  ...
);

-- Example in SELECT
SELECT
  clm_id,
  diag_onset_dt as diagnosis_onset_date
FROM claims;

Common uses in healthcare data

Healthcare data warehouse schema design and modeling
Interoperability and cross-system data exchange
ETL pipeline development and orchestration
Master data management (MDM) programs
Analytics and business intelligence reporting

Example database column name

ISO-11179 snake_case standard

-- Recommended column name
diagnosis_onset_date

-- Example DDL
CREATE TABLE healthcare_data (
  record_id   VARCHAR(50)   NOT NULL,
  diagnosis_onset_date DATE,  -- diagnosis onset date (date only, no time)
  created_dt  TIMESTAMP     NOT NULL DEFAULT NOW()
);

Column names follow the ISO-11179 naming convention: lowercase, underscore-separated, using the standard abbreviation as a prefix where applicable.

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