Does Medicare Cover Tysabri? 
Medicare Part B covers Tysabri as in infusion ; however , then you must pay the 20 % copay and this can be very costly . The Medicare code for Natlizumab/Tysabri is Q4079 . If you have a supplemental plan that covers major medical , it will be covered 100 % . Also , Medicare Part D covers Tysabri 100 % . 