Because I'm currently interested in dental supplementary insurance (and my health insurance is trying to sell me a private insurance), I've read through the hints and explanations. In doing so, I came across the following nice paragraph under the title "Release from confidentiality clause":
I am aware that the insurer verifies information about my state of health before concluding the contract, to the extent that this is necessary for assessing the risks to be insured in the case of the contract conclusion I am applying for and my statements give cause for it. For this purpose, I release doctors, dentists, members of other healing professions as well as employees in hospitals and health authorities from their confidentiality, to the extent that I have been examined, advised and treated in the last 10 years prior to the application. This declaration is valid beyond my death.
It gets even worse - but I'll spare you the details. Great - the legislator is cutting back on the benefits of the statutory health insurance. Ultimately, the insured person is forced to take out supplementary insurance, at least if they cannot afford the treatments on their own and need to plan ahead. For this, however, they must then simply waive any confidentiality obligations towards the private insurance company - and even permanently, as death does not apply. Now, let's put all this into perspective - I pay a multiple of the measly 6.42 euros that the supplementary insurance would cost me to the statutory insurance. But there, I don't need to waive my confidentiality so drastically and unrestrictedly for dental services (in the above paragraph, the type of request is not even limited to the medical field of the insurance!) - but for the private insurance, I have to give up all rights to my data.
That's complete nonsense.
Additionally, of course, it also bothers me that the insurance company advertises in a leaflet about dental supplementary insurance that it has been tested with "very good" by Finanz Test, for example - but not for dental supplementary insurance, but for "single room rates". Which is really very informative for the assessment of the dental supplementary insurance ...