prescription onset date

rx_onset_dt

pharmacy

Updated 3/30/2026

Definition

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

Standard Abbreviation

rx_onset_dt

Database Usage

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

-- Example in SELECT
SELECT
  clm_id,
  rx_onset_dt as prescription_onset_date
FROM claims;

Common uses in healthcare data

PBM claims adjudication and drug utilization review
Controlled substance monitoring and DEA compliance
Pharmacy data warehouse and ETL pipeline design
Prior authorization and step therapy workflows
Medicare Part D reporting and CMS submissions

Example database column name

ISO-11179 snake_case standard

-- Recommended column name
rx_onset_dt

-- Example DDL
CREATE TABLE healthcare_data (
  record_id   VARCHAR(50)   NOT NULL,
  rx_onset_dt  DATE,  -- prescription 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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