How does the HIE match patient records?

CRISP Shared Services’s PatientMatch system is a sophisticated Master Patient Index (MPI) designed to accurately match patient records submitted by healthcare organizations across regions. The system evaluates demographic data across 9 attributes using weighted scoring to calculate match probability.

Both active (current) and inactive (historical) demographic values are stored, ensuring that even outdated information from a source can still be connected to the correct patient record. Required data elements include a unique source ID code, MRN, patient name, and date of birth, while additional demographic fields can strengthen match accuracy.

When clinicians query the Florida HIE, powered by CSS, the system returns all highscoring matches to help ensure the correct patient is selected, especially when multiple individuals appear nearly identical in the data.

Conversely, results will appear if a patient has formally opted out of data sharing but there will be no data associated—as permitted under state law—or if an entity is placed in “overlay” status due to conflicting demographic information submitted by a source. As permitted under state law pertains to those mandated public reporting like PDMP (prescription drug monitoring programs.)