A duplicate Medicare card may be obtained at the U.S. Social Security Office's website, socialsecurity.gov. If the requester has recently moved or does not wish to request a duplicate card online, then requests for duplicate cards can be made by telephone or by visiting a local Social Security office.
To request a duplicate Medicare card online, Medicare recipients can simply visit the Social Security Office's website and click on the link "Replace a Medicare Card." Recipients can then follow the step-by-step instructions to fill out the online duplicate request form. This form is only available to those who have not recently moved. Replacement cards are generally mailed in about 30 days to the last address on file. If proof of Medicare is needed before 30 days, a proof of Medicare letter can be requested, and Social Security generally mail the letter in about 10 days.
As of January 2015, recipients who have recently moved and need to request a duplicate Medicare card should call Social Security at 1-800-772-1213. This number is available Monday through Friday, from 7 a.m. to 7 p.m.
Lastly, recipients can also visit the a local U.S. Social Security Field Office in person. Visiting a local field office in person is recommended if a recipient needs proof of Medicare sooner than 10 days.