I assume this MSA, being an MA, allows for a trial right option, and GI back to med supp.?
CMS sets rules for GI into Medicare. I don't see the MSA option in this chart.
Based on the few "legitimate" GI cases I have handled, it almost seems like the documentation process varies by carrier. Most want a letter from the prior carrier stating the individual has a guaranteed right, but I have seen a few cases where the carrier letter was not required. And at least one situation where the carrier alluded to a guaranteed right but avoided that language specifically.