Alert Social Security if you receive benefits
If you delay Medicare enrollment, you don’t need to provide notice unless you receive benefits from Social Security or the Railroad Retirement Board. If you do receive either of these benefits, you are automatically enrolled in Medicare Parts A and B at age 65. You’ll need to contact Social Security and let them know that you wish to delay Part B. You must have Medicare Part A, however, if you receive Social Security benefits.
How to contact Social Security
If you don’t receive an enrollment notice three months before your 65th birthday, call the Social Security Administration: