Huh. I'm not an expert on all of that, so I can only roughly outline these things.
georgeob1 wrote:If I understand you correctly, in Germany all residents must join one of the approved ("linked by a common legal framework") insurance programs.
Not quite. If you qualify for private health insurance, you can pick one of the private health insurance companies, pick one of the statutory health insurers, or not pick one at all.
If you decide to leave the statutory health insurance, it's quite hard to join it again later - which results in many self employed and high salary employees remaining in the statutory system.
georgeob1 wrote:No one has the right to simply choose a doctor or hospital and simply pay the bill himself. OK so far??
Well. You always have the right to choose a doctor or hospital. You can also pay the bill yourself. However, the number of people who choose to do so simply because they don't have any insurance plan at all is very small. It is estimated that there are currently about 300,000 people without any kind of insurance (out of ~82 million).
georgeob1 wrote:Just what is this "common legal framework"? Does it set a limit on the treatments available or covered by the insurance programs?
Part of that common legal framework is a risk structure compensation scheme. Statutory health insurers pay a certain percentage (less than 13 percent) of the premiums they receive into a common pool, that will be re-devided according to risk and age structure of the members.
Another part is a "risk pool", managed in the way of a fond, that compensates insurance companies for the costs of high-intensity care patients (typically accessed by the insurers for less than 1 percent of their members). A couple of other parts are in place, too.
The limit on treatments is not set by the legal framework, but rather by the insurance companies, based on your premiums. Your premiums are also tied to your income (however, they will somewhat vary between insurance companies). You will pay a certain percentage (depending on the insurer) out of your salary, and premiums are paid in equal parts by the employer and the employee. You always have the option to pay into an additional private insurance (if you don't qualify for private insurance) or pay more for a different insurance programme or with a different provider within the statutory health insurance. In summary, you will pay more for the same programme when you earn more (though the percentage will remain the same), but you can decide to pay higher premiums for additional services.
georgeob1 wrote:Do these limits apply to all approved insurance programs?
There's a large number of insurance companies offering a statutory health insurance programme. Programmes will slightly vary from one company to the other. You can usually choose to pay more, and have more services covered. You can also choose to pay into additional insurances. There are minimum services that an insurer has to provide. An insurer cannot choose to not cover these services. In that sense, these limits apply to all insurance programmes.
georgeob1 wrote:Who sets the limits?
The limits in the sense of a list of minimum services that an insurer has to provide are set by the respective laws. There are also several types of statutory health insurers, e.g. insurance types for seamen, miners or farmers, or for company insurers (Siemens, for example, would have its own insurance plan, in the form of a statutory insurance [company]. That insurance could then decide to accept non-Siemens employees as well). Limits and conditions may vary between those various types (I don't really know enough about that).
georgeob1 wrote:Are the insurers free to set their own premiums, or are they controlled (or limited) by the government?,
Insurers are free to set their own premiums. Premiums within the statutory systems may vary up to 3.5 percentage points.
georgeob1 wrote:I take it the "statutory insurance program" is free to those receiving government payments, and that some self employed and high salary employees are free to join it if they wish by paying the government premium. Does it provide the same benefits up to the same limits as the other approved insurance programs?
Well.... It's the same system, and the same insurer. If you're self employed, you'll have to pay the premium that specific insurer within the statutory system charges you, and the programme will cover the respective services you pay for - just as it would if you would pay for it as an employee.
georgeob1 wrote:I assume the fees doctors and hospitals can charge for their services are set by the various insurance programs. Are they the same for all programs, or do they vary?
They vary. There's no short answer to that question.
georgeob1 wrote:Are doctors and other service providers free to serve multiple insurance programs?
Yes.
georgeob1 wrote:What you have described to me appears to be a program of socialized rationing of services, but with multiple choices, presumably of the cost and associated rationing limits associated with each insurer, available to all residents.
Doesn't seem to be "rationing" to me. Rationing would assume that there's only a limited amount of something available. But you can always get more service for more money, in all programmes. You can pay more in the statutory programmes, you can certainly pick in the private programmes, and you can choose to pay for additional insurances. So it's more of a "rationing" as in demand and supply.
georgeob1 wrote:How is the universality element enforced?
The statutory health insurance is mandatory, and is to be paid in equal parts by employers and employees.
georgeob1 wrote:Does the government know which insurer covers each resident?
Not by definition. No.