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7/11/2026
Epic Clarity Data Model Guide for Healthcare Data Engineers

Epic Clarity Data Model Guide for Healthcare Data Engineers

Short summary

A comprehensive guide to Epic Clarity, the SQL Server reporting database used by approximately 38% of US hospitals. Covers the four-layer Epic data architecture (Chronicles, Clarity, Cogito, Caboodle), core tables for encounters/demographics/diagnoses/orders, and naming conventions essential for mapping Clarity columns to warehouse standards. Includes practical SQL examples for joining lookup tables and decoding category fields.

  • •Epic Clarity runs on SQL Server and is the primary extraction point for healthcare analytics
  • •Guide covers four Epic data layers and core tables with DW equivalents
  • •Naming conventions (_C, _ID, ZC_, CLARITY_, LINE) explained with SQL examples

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