Enroll in Medicare A and B using the link below-you will need to use your my social security account user name and password or create an account to enroll—click on the link below and scroll to the "apply for medicare only" button—be sure to say yes to medicare part B and no to employer coverage if this is ending or not valid https://www.ssa.gov/benefits/medicare/
Late Retiree To complete part B enrollment online have the employer verification form completed and saved to your desktop to upload with your application. There are also other options for proof of prior creditable coverage on the part B application https://www.ssa.gov/benefits/medicare/
Scroll down to "already on Medicare"
Apply using your Medicare # and personal information
Note in the remarks when your other coverage will end and when you want part B to begin