The TK scores the bills for sleep laboratories, so...

The TK scores the bills for sleep laboratories, so sleep laboratories no longer accept TK patients. In Hamburg you have to go to one of four sleep laboratories, which have a special contract with the TK. Two of these four laboratories have long since canceled their cooperation ("nothing but trouble"). One of the two remaining labs can not customize a CPAP mask, leaving only the sleep lab in the UKE.
Waiting time: 9 months!
With a decent supply, as required by law, this has nothing to do anymore.
Anyone who does this, as an OSAS patient, will then only have to pay for a used respiratory therapy device from the TC without additional payment.
Incidentally, TK generates surplus profits in the three-digit millions each year. Anyway, I know whose costs are being saved.
In my view, the TC is not recommended.

Anyone who is still a member: Once the TK contact with the concern, then submit directly to the lawyer and file a lawsuit. Saves a lot of pointless stress and then things suddenly work.