You're talking about George Mason University in VA? I just checked the website (since what you posted sounded fishy -- the CCNE only accredits BSN and graduate nursing programs, not ADN or diploma programs, so why would a program specifically for RNs who don't
have a BSN require CCNE accreditation?) and this is what I found on the information page for the RN-to-MSN pathway program: Admission Requirements
Applicants for the RN to MSN program must meet the following requirements to be considered for admission. Graduate admission is competitive and meeting minimum requirements does not guarantee admission to the program.
• Possess current RN license
• Be a graduate of an NLN or CCNE accredited nursing program ... http://chhs.gmu.edu/pdf%20files/Abou...SN-RNtoMSN.pdf
So, you are safe.