The care for sleep apnea patients is disastrous. T...

The care for sleep apnea patients is disastrous. TK cuts down the bills for the sleep laboratories, so TK patients only get an appointment in laboratories that have a contract with TK. There is only one for all of Hamburg.
Waiting time: 9 months. Spare me any comment on it.

Thereafter, TK only pays for a used CPAP device. If you want a new one, you have to pay an additional 120 euros per year and pay for maintenance and repairs completely yourself.

As a voluntarily insured person, what do I actually pay 700 euros a month for?