If you have public health insurance, you also pay for nursing care insurance (Pflegeversicherung). It pays for your healthcare when you are old.
Pflegeversicherung costs up to 4% of your income. You pay less if you have children. Your employer pays half of it. It comes from your paycheck every month.
If you have private health insurance, Pflegeversicherung is included in your insurance policy. The cost is set by the company; it’s not a percentage of your income.