PPO Plans cover a member both in and out of the dental provider network.
HMO plans only cover you in the plans provider network. These plans are more affordable but will limit your choice of dentist.
MAC vs UCR Reimbursement
If you use an out-of-network dentist, your costs will depend on whether your plan reimburses out-of-network dentists at Maximum Allowable Charge (MAC) or Usual, Customary, and Reasonable (UCR). Under MAC reimbursement, the insurer will only reimburse an out-of-network provider the same amount the insurer's "in-network" dentists accept for a given procedure. If the out-of-network provider's charges are higher, you will be "balance billed" for the difference. UCR reimbursements for out-of-network dentists are generally higher, which minimizes balance billing. As expected, UCR plans are more expensive than MAC-type plans.
Rollover Plans- Some plans allow a member to apply some of the unused annual maximum from a current year to the next year's annual maximum. There are usually limitations to how much can be rolled over.