Mr. Castillo, a naturalized citizen, previously enrolled in Medicare Part B but has recently stopped paying his Part B premium. Mr. Castillo is still covered by Part A. He would like to enroll in a Medicare Advantage (MA) plan and is still covered by Part A. What should you tell him?
a. He is not eligible to enroll in a Medicare Advantage as a naturalized citizen.
b. He is not eligible to enroll in a Medicare Advantage plan until he re-enrolls in Medicare Part B.
c. He can enroll in a Medicare Advantage plan if he has dropped Part B less than 90 days ago.
d. He can enroll in a Medicare Advantage plan but it will pay only the benefits associated with Medicare Part A.