Universities will consider students who have taken 15 credits or more through a school who has a regional accreditation to be evaluated the same way as other incoming freshmen. Each individual university has different rules.
These are the regional accreditations accepted by universities across the country:
Middle States Association of Colleges & Schools (MSA). New England Association of Schools & Colleges (NEASC), North Central Association of Colleges & Schools (NCA), Northwest Accreditation Commission (NWAC), Southern Association of Colleges & Schools (SACS),