David J. Meyers, PhD, MPH

After evaluating the association between the expanded Medicare Advantage supplemental benefits and plan composition, authors determined that adoption was not associated with large demographic shifts in enrollment.

Medicare Advantage enrollment was higher among immigrants compared with US-born residents, but the highest enrollment was found among immigrants with limited English proficiency.

Medicare Advantage enrollees, particularly those with lower out-of-network benefits, may have restricted access to top-ranked hospitals for complex cancer care compared with traditional Medicare enrollees.