To amend part B of the title XVIII of the Social Security Act to apply deemed enrollment to residents of Puerto Rico and to provide a special enrollment period and a reduction in the late enrollment penalties for certain residents of Puerto Rico.

Puerto Rico Medicare Part B Equity Act of 2013 - Amends title XVIII (Medicare) of the Social Security Act to repeal the exclusion of residents of Puerto Rico from deemed enrollment under part B (Supplementary Medical Insurance Benefits) and thus apply it to them. Directs the Secretary of Health and Human Services (HHS) to provide for a special seven-month enrollment period for such...