In the United States, Participating Provider Network or PPO, also referred to as Preferred Provider Organization, is an organization governed by medical doctors, hospitals, other health centers, and medical care providers. This organization has an agreement with an insurer or the third party administrator to provide health insurance to the people associated with their client at reduced or low rates. Participating Provider Network plan may work similar to a DHMO while using an In-Network facility. However, a PPO allows Out-of-Network or Non-Participating Providers to be used for service. Any difference of fees will become the financial responsibility of the patient, unless otherwise specified.

As time passes, many seniors leave dental coverage (and vision and hearing) behind. Then, when they need it, it is too late. Waiting can be devastating in some cases as many insurances have waiting periods for certain services. For example, a routine filling for a cavity typically requires a 6-month wait. If you can’t wait that long, you will have to pay the cost in full.
Blue Cross Blue Shield has a plan called BlueCare that does not have a waiting period for preventative services and many non-surgical procedures. United Healthcare's United Health One is another. Major surgical treatments and restorative work do require some wait time, though that can be curtailed to some extent if you're coming off another dental plan.
Dental plans will usually cover a portion of your costs on different types of dental procedures. Some plans focus more on preventative and basic dental care, but offer less coverage on major dental procedures. It's important to understand what's best for your dental health. If you routinely need a root canal or get cavities, you'll want a plan that provides better coverage on those types of procedures. In contrast, if you have relatively healthy teeth then you might not need to pay for the extra coverage.
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