OpenVistA — Legacy Healthcare, Modernized

Context

What is VistA?

VistA (Veterans Health Information Systems and Technology Architecture) is the electronic health record system of the United States Department of Veterans Affairs. Built in 1966, it runs on MUMPS—a language and database that predates the relational model. The VA's VistA codebase spans approximately 3.7 million lines of MUMPS and serves over 9 million veterans annually.

Demo Scope

What this demo shows

Live data extracted from VistA VEHU—the official VA training database. 193,900 real records across 22 clinical tables, pulled directly from MUMPS globals. Fifteen clinical packages:

Patient Registration Problem List Vitals Allergy Pharmacy Lab Orders Consults Mental Health Radiology Inpatient Meds PCE TIU Notes Health Summary Scheduling

Data Provenance

Direct extraction

This data was extracted directly from MUMPS globals—^DPT, ^PSRX, ^GMR, and others. Not mock data. Not FHIR conversion. Direct MUMPS extraction.

193,900 records VEHU database 15 packages