Orange County Medical Emergency Data System

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The Orange County Medical Emergency Data System (OC-MEDS) is the countywide EMS information system used to track patient care events from the moment that a request for emergency medical service is received through discharge from an Emergency Department. The system is based on current standards as defined by the National EMS Information System (NEMSIS) and the California EMS Information System (CEMSIS).  

Pursuant to California state statute (§1797.227) and local OCEMS Policy (300.30), all EMS Providers must utilize a Patient Care Reporting System (PCRS) that is certified compliant with the current version of NEMSIS (v3.4.0). The system must also include statewide CEMSIS data standards and include additional data elements as defined by the OC-MEDS Data Dictionary.  All EMS Providers must make the transition no later than December 31, 2016.






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