Let's ring out 2020 with a final tracking of Medicaid enrollment during the pandemic.
In this 33-state sample, based on state monthly reports, Medicaid enrollment increased 11.1% from February through October, and an estimated 12.1%* from February through November.
Since the increase reported in CMS's official tallies, currently running through a preliminary August report, generally show about a half percentage point slower growth** than my more up-to-date tally (8.3% vs. 8.8% for August), I imagine that CMS will show an increase of about 11.6%, February through November. That would mean 79.4 million people enrolled through November, an increase of about 8.25 million since February. [Update, 4/5/21: CMS's preliminary November total does indeed show an increase of 11.6% since February.]