Short Answer
You can receive medical treatment today by providing a digital or printed replacement certificate from your insurer.
A PDF document serves as the legal equivalent of your physical card until the plastic arrives in the mail.
What Most Expats Don't Realize
You felt a sudden fever but your physical card was still stuck in the mail two weeks after you registered. You almost turned around at the clinic door, fearing a massive private bill for a simple consultation. You avoided a €200 "private patient" deposit only because you requested a temporary certificate via your insurer's app at the last minute.
What To Do
- Email your health insurance provider to request a "Mitgliedsbescheinigung" or "Abrechnungsbescheinigung."
- Print the PDF document or have it ready on your smartphone screen.
- "Ich habe eine Abrechnungsbescheinigung." (I have a billing certificate.) — Show this to the receptionist if they ask for your card.
The Truth
Germany runs on paperwork. As long as you have the correct document, the physical plastic card is not required for treatment.