Enrollment in Medicare Advantage hit a record 14.4 million this year, challenging predictions that ObamaCare's cuts will kill the private plans. The Kaiser Family Foundation (KFF) reported Monday that enrollment in Medicare Advantage grew by nearly 10 percent in the last year and by 30 percent since 2010. Growth in Medicare Advantage has been the norm since the enactment of Medicare's prescription drug benefit and comes in spite of a decline in the number of plans available to enrollees, the analysis said. Researchers did not seek to further explain Medicare Advantage's rising popularity. They cautioned that the Affordable Care Act's cuts could still disrupt the market.