Neptune is a research data warehouse that has been established to provide electronic medical record and research data for clinical and translational research and for national data marts. Neptune is updated monthly and currently contains the following data:

• Period: January 2004 - May 2023
• Patients: 4.84M
• Encounters: 421M
• Diagnoses: 290M
• Procedures: 121M
• Laboratory test results: 1320M
• Medication orders: 88M

This work is funded by grant UL1 TR001857 from NCATS, NIH.

Neptune consists of four major components that include 1) an operational data store, 2) an atomic data store, 3) a map store, and 4) an integrated view.