Short Answer
Your health insurance card provides identical coverage in all sixteen German states regardless of where you live.
There are no regional restrictions or extra fees for crossing state lines to visit a physician.
What Most Expats Don't Realize
You lived in Berlin but found an immediate opening for a necessary surgery at a clinic in Brandenburg. You cancelled the appointment because you thought your insurance only covered your home state and feared a massive out-of-network bill. You lost six weeks of recovery time and had to endure worsening symptoms while waiting for a local doctor who finally billed you the same amount anyway.
What To Do
- Book the earliest available appointment you find on a nationwide search, even if it requires a regional train ride.
- Show your standard health insurance card (eGK) at the reception desk just as you would locally.
- "Übernimmt meine Versicherung die Kosten auch in einem anderen Bundesland?" (Does my insurance cover costs in another state as well?) Ask your insurer this if you need peace of mind before traveling.
The Truth
Germany’s healthcare system is federal and centralized for the patient. Geography is an administrative detail for the insurers, not a boundary for your medical care.