NYSHIP requires you and your dependents to be enrolled in Medicare Parts A and B when first eligible You/your dependents must be enrolled when first eligible even if also covered through another employer's group plan.

     You must be enrolled in Medicare Parts A and B  and entitled to receive Medicare benefits by the first day of the month in which you reach 65, or before age 65 if you are disabled or have end stage renal disease.

     As soon as you become eligible for Medicare, your NYSHIP coverage will pay secondary to Medicare or are in a waiting period for Medicare to go into effect.  Plan benefits may change.

     If you are not enrolled in Medicare Parts A and B  when you are first eligible to enroll, you will be responsible for the full cost of medical services that Medicare would have covered.

This information was taken directly from the Medicare Handbook!!!!