I find this confusing as well. People getting subsidies are not moving from private insurance to public insurance. They remain on private insurance. And, while it is true that some doctors are refusing to participate in Medicare because of reimbursement rates, that will not apply to private sector health plans under the plan approved. Most of us (until we are 65) will continue under the same old plans we are under or new plans under the exchanges. We will have the same advantages and disadvantages we have now (e.g. will my doctor participate in the BC/BS PPO, Aetna, GEHA, etc).
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From the synopsis at the Kaiser Family Foundation
http://www.kff.org/healthreform/upload/8023-R.pdf
". . .States will create American Health Benefit Exchanges where individuals can purchase insurance . . . Premium and cost-sharing subsidies will be available to
make coverage more affordable.
Although there will not be a public plan option in the Exchanges, the Office of Personnel Management, which administers the Federal Employees Health Benefit Program, will contract with private insurers . . . Plans in the Exchanges will be required to offer benefits that meet a minimum set of standards. Insurers will
offer four levels of coverage that vary based on premiums, out-of-pocket costs, and benefits beyond the minimum required plus a catastrophic coverage plan."
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So, subsidies/credits will only be available to individuals purchasing within the exchanges. Once an individual chooses a plan offered in a Health Exchange, they are signing up for one of four benefit packages. The benefit design is administered by the government (Office of Personnel Management).
While the rules for what OPM will "administer" haven't been written, they currently administer the FEBHP by setting provider compensation, designing the benefit plans, and setting the rates for premiums. Once you have government negotiating payment rates and benefit design (rather than the marketplace), you have a public option.
If the rates are not competitive with what the private insurers can offer, you have a continued problem with access to care. There will be no substantive change to what insurers do in the marketplace, and there is no guarantee that the plans offered in the Exchange will be represented by a majority of the private carriers -- only that there be at least two carriers, one being a not for profit.
You are correct, for the majority of people who currently have access to health insurance, nothing needs to change. For those thinking about how the Health Exchanges and subsidy/credit option can be beneficial, I am only saying one needs to be aware that the benefits might not be the same, and if Medicare is any example, there may be problems with access to the health care providers.
That doesn't mean that the Federal Employee program is one where the access or benefits are restricted -- because they are not. Federal employees enjoy benefit plans that can be broader than what an individual can buy in the marketplace today.