https://www.health.state.mn.us/facilities/ehealth/auc/guides/docs/cg837p.pdfhttps://www.cgsmedicare.com/pdf/edi/835_compguide.pdfhttps://www.uhcprovider.com/content/dam/provider/docs/public/resources/edi/EDI-ADT-Implementation-Guide-HL7.pdfhttps://github.com/nextgenhealthcare/connecthttps://www.conevity.com/connexion/