Short answer up top, then the exact rule. Here's what Original Medicare does and doesn't cover for emergency room visits in 2026 — and where a Medicare Advantage plan can fill the gap.
Quick answer: Yes. Part B covers emergency department services. You pay a copayment for the ER visit, a copayment for each hospital service you get, and — after the Part B deductible — 20% of the Medicare-approved amount for the doctors who treat you. The costly wrinkle: an overnight stay doesn't automatically make you an inpatient.
Medicare Advantage (Part C) plans cover emergency care whether it's given in the plan's network or outside of it — so you should never delay an ER visit to check your network. Plans charge their own ER copay instead of the Original Medicare cost-sharing. Care after you're stabilized is where network and authorization rules come back, so tell the plan about the visit and ask what follow-up needs approval.
Anyone weighing the ER against urgent care, and anyone who's been kept 'for observation.' Ask directly whether you've been admitted as an inpatient or are under observation — that one answer changes which part of Medicare pays and what you owe.
See the current Part A, Part B, and Part D numbers — premiums, deductibles, and the new drug cap — in one place. Free, no signup.
See 2026 Medicare Costs →You pay a copayment for the emergency department visit, a copayment for each hospital service, and 20% of the Medicare-approved amount for the doctors' services after the Part B deductible. Any single outpatient hospital copayment can't exceed the inpatient hospital deductible, though your total for all services in the visit can be higher.
Staying overnight doesn't by itself make you an inpatient. If no doctor has written an order to admit you, you're still an outpatient under Part B — even overnight — and you pay outpatient copayments. If you are admitted as an inpatient, Part A covers the stay and its hospital deductible applies. Ask the hospital which status you're under.
Coverage gaps in Original Medicare — like emergency room visits — are exactly what a Medicare Advantage or Medigap plan is meant to fill. Our free Enrollment Finder shows the window you can switch in, and the guide library walks through the trade-offs. This page is free to share with anyone weighing their options.
Open the Enrollment Finder →This answer is based on U.S. government Medicare coverage rules: