Avoid Medicare Enrollment Headaches! Hello, Enrolling in Medicare involves more steps than most people realize and the process has recently changed. Applying for Medicare A and/or B is done through Social Security. If an application for Medicare A and B is for someone who paid in to Social Security (not a spouse, ex-spouse, or deceased spouse) then an on-line process can be used for Medicare Part A and also for Part B (if applying for B around one’s 65th birthday). An on-line process rather