No. Outside narrow border-emergency exceptions, Medicare pays nothing outside the United States. Every plan for retiring to Portugal has to answer three questions: what replaces Medicare there, what happens to Part B while you're gone, and what happens if you come back. Most guides skip the second and third. Those are the expensive ones.
Once you are a legal resident, you register at your local health centre (centro de saúde) for a número de utente and gain access to the SNS, Portugal's national health service, with the same entitlements as citizens — modest co-payments of roughly €5 for a GP visit and €7.75 for a specialist. Emergency care is provided regardless of status. The SNS is real medicine at almost no cost; its weakness is waiting times for non-urgent specialist care.
That's why most American residents add private cover. The honest price picture, by age band, for domestic Portuguese insurers (Medis, Multicare, AdvanceCare and similar): under 55 roughly €50–150/month; 55 and over, €100–300/month; international policies (Cigna Global, Allianz Care and similar) run higher — a verified reference point is about €559/month (€6,708/year) for a 65–69-year-old on a mid-tier international plan covering Portugal. Two traps: options narrow sharply after 70 (several insurers refuse new applicants), and pre-existing conditions face waiting periods or exclusions. Your D7 visa application will also require proof of health cover from day one, before SNS registration is possible.
While you live in Portugal, Part B (standard premium $202.90/month in 2026) buys you nothing usable. But dropping it triggers a permanent late-re-enrollment penalty of 10% of the premium for every full 12 months unenrolled, plus a wait for a General Enrollment Period that can leave you uncovered for up to a year after moving back. Eight years abroad means a permanent +80% surcharge for the rest of your life if you return. Whether keeping it is worth ~$2,435/year is a probability question about your own future — our calculator does the arithmetic for your numbers. The pattern we'd flag: people are systematically overconfident that they'll never move back. Serious illness, a spouse's death, and grandchildren are the three reasons people return, and none of them announce themselves in advance.
Sources: medicare.gov (coverage abroad; Part B premium and penalty) · SNS/ACSS co-payment schedule · LVP Advogados on SNS access for foreign residents · Feather international premium data (senior bands, 2026) · Relocate Handbook Portugal insurance survey (2026). Full links in our source register; every number above carries its verification date.