The Professional EDI Claims System(PECS) is an electronic claims management and 837 Professional EDI claim generation system.PECS is an EDI engine that generate a HIPAA-compliant ASC X12 5010A1 837 Professional claims file.
Electronic Remittance Advice (ERA) or X12 835
Electronic Remittance Advice (ERA) better known as EOB or 835 is a lite version of ERA (835) processor. The ERA processor converts an ERA from an EDI 835 file into a readable text file. The latest “Lite” version of the ERA Processor can be found here in the list of files. A user guide is included in the list of files to show the capability of the ERA Processor and functionality.
open source means you are supposed to supply source code