Gateway Health Plan Medicare Assured® is a Medicare approved Special Needs Plan for people with both Medicare and Medicaid. To become a member you must be entitled to Medicare Part A and enrolled in Medicare Part B, receive Medicaid (full or QMB) and reside in our service area. Because your health plan plays a very important role in your overall health and medical care, it's important to choose the right one. The right health plan can mean a lot – especially when you really need it. Gateway Health Plan Medicare Assured® gives you the benefits you need to stay healthy.