Approximately 2.2 million people enrolled in a Medicare Advantage plan from February 2021 to February 2022, bringing the total MA population to 28.6 million medical lives. That’s an 8.5% year-over-year increase, according to AIS Health’s analysis of data that included enrollment from the 2022 Medicare Annual Election Period (AEP), down from 9.9% growth during the prior-year period. Nearly two-thirds (64.3%) of all new enrollees selected a plan from UnitedHealthcare, Humana Inc. or CVS Health Corp.’s Aetna, while Centene Corp.’s major market expansion paid off, garnering more than 30% enrollment growth for the insurer. Meanwhile, Florida Blue parent GuideWell Mutual Holding Corp.’s completed acquisition of Triple-S Management Corp., one of the largest MA insurers in Puerto Rico, allowed it to crack the top 10 for the first time. Anthem, Inc. also completed a Puerto Rico MA deal with its July 2021 acquisition of MMM Holdings from InnovaCare Health. On the state level, four states saw MA growth of more than 20% (vs. 10 last year), including Delaware and Vermont, which have historically low penetration rates.