If you’re in the public health insurance (GKV) system, you can choose between over 90 different health insurers (Krankenkassen). The basic coverage mandated by law is identical across all of them. What differs is the service quality, additional benefits, and the monthly surcharge (Zusatzbeitrag).
The Basics: What’s Always the Same
All GKV insurers provide: GP and specialist visits, hospital care, prescription medications (with standard co-payments), maternity care, mental health services, and preventive screenings. These are set by law and cannot be cut. You always pay the same percentage of your salary to GKV (14.6% base, split employer/employee), plus the insurer-specific Zusatzbeitrag.
Techniker Krankenkasse (TK)
Largest Krankenkasse by member count (~11 million). Strong digital infrastructure: their app handles most administrative tasks, online doctor chat (in German), and fast claim processing. Zusatzbeitrag in 2024: 1.2%. Popular with IT workers, students, and professionals who prefer digital-first interactions. English-language customer service available (not all services).
AOK (Allgemeine Ortskrankenkasse)
Regional insurer (different AOK organizations per state — AOK Bayern, AOK Berlin, etc.) with the most physical branches of any insurer. Strong for older members and anyone who prefers in-person service. Local focus means local health programs (gym partnerships, prevention courses). Zusatzbeitrag varies by region (1.0–1.8% in 2024). Weakest digital experience of the major insurers.
Barmer
Second-largest by membership. Strong in mental health coverage (teletherapy partnerships, faster referrals to psychologists). Good app. Zusatzbeitrag 2024: 1.7% (higher than TK, but additional mental health benefits may justify it for some). Above-average complementary medicine coverage (acupuncture, osteopathy).
DAK-Gesundheit
Focus on prevention programs and workplace health. Strong partnerships with fitness networks (Hansefit, Urban Sports Club at discounted rates). Zusatzbeitrag 2024: 1.7%. Good choice if your employer has a company health program that aligns with DAK partnerships.
How to Switch
You can switch Krankenkassen once every 12 months. Submit a Kündigungsschreiben to your current insurer; they must respond within 2 weeks. Your new insurer handles the rest. Switching during a course of treatment (ongoing specialist care, pregnancy) is allowed — coverage continues uninterrupted.
