Many people purchase their health insurance through the Health Insurance Marketplaces established by the Affordable Care Act in 2010. Yet when people become eligible for Medicare, there is little notification and thus much confusion on how and when to make the transition to this federal health care program. Below is some information with 3 main points and several action tips put together by the national SHIP Tech Center, the Senior Medicare Patrol National Resource Center and Medicare Rights Center on Health Insurance Marketplaces and how they affect Medicare. This information can help you can make informed decisions about your Medicare enrollment. For questions and/or assistance, contact your local Health Insurance Counseling and Advocacy Program (HICAP).