Veterans Health Administration Corporate Data Warehouse

The Corporate Data Warehouse (CDW) is the enterprise-level physical implementation of a health data warehouse for the Veterans Health Administration (VHA). It consolidates data from disparate sources, including Veterans Health Information Systems and Technology Architecture (VistA), to support analysis and healthcare delivery. The warehouse has been storing data since 2006, with a renewed expansion effort beginning in 2010.

Use Cases

• Analyze patient outcomes across VISN (Veterans Integrated Service Network) regions using consolidated clinical data.
• Prototype new reporting tools by extracting data directly from VistA source systems with minimal transformation.
• Support operational reporting at local VHA facilities using data shared with Regional and VISN Data Warehouses.
• Study trends in healthcare delivery by examining subject areas developed within the CDW production environment.

Strengths

• Enterprise-level implementation for a major national healthcare system, the VHA.
• Consolidates data from multiple source systems into a single logical data model.
• Supports both fully developed production subject areas and rapid prototyping capabilities.
• Data collection has been ongoing since at least 2006, providing a longitudinal foundation.

Limitations

• Specific data volume, row count, column structure, and file formats are not publicly documented.
• Access and usability likely require familiarity with VA systems and data governance protocols.
• The description lacks concrete details on data granularity, update frequency, or sample records.

Provenance

Source

Department of Veterans Affairs, Veterans Health Administration.

Collection Method

Consolidated from disparate VHA source systems, including VistA and other national data systems.

Time Range

Data stored since at least 2006.

Freshness

Metadata was last updated in August 2025, but actual data update frequency is unknown.

Geography

Primarily United States, covering the Veterans Health Administration network.