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A preferred provider organization (PP0) is a network of doctors and other healthcare providers that offers discounted care to members of a sponsoring organization, usually an employer or union.
You may also arrange private insurance coverage though a PPO.
If you're insured through a PPO, you make a copayment for each visit to a healthcare provider, though certain diagnostic tests may not require copayment.
You typically have the option to go to a doctor or other provider outside the network, but you pay a larger percentage of the cost, called coinsurance, than if you used a network doctor.
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