Medicare Advantage plans are growing in popularity as a choice for aging baby boomers and payers are expanding their MA offerings. As traditional Medicare spending increases faster than MA, payers see opportunity in the MA market. However, increasing star ratings is key to attracting more enrollees and driving revenue. A Navigant analysis found that improving a plan's rating by one star can increase annual enrollment by 8-12% and improving from 3 to 4 stars can boost plan revenue by 13-17%. To improve ratings, plans need to invest in closing care gaps and sharing quality initiatives with providers.