A PPO dental plan pays a percentage of the cost and lets you visit any licensed dentist, with the best pricing inside the plan's network. A DHMO assigns you to a contracted dentist, uses fixed copays, and typically pays nothing outside its network. PPO plans usually cost more but offer far more flexibility — which matters when you need major work done soon. All six plans in our catalog are PPO-based.
How a PPO plan works
PPO stands for Preferred Provider Organization. The plan builds a network of dentists who agree to charge negotiated fees — rates that are typically lower than their standard prices. The plan then pays a percentage of the fee by service class: many PPO plans pay around 100% for preventive care, around 80% for basic services and around 50% for major work, subject to a deductible and an annual maximum.
Two freedoms define the PPO model. First, you choose your own dentist inside the network — no assignment, no transfer paperwork. Second, most PPO plans also pay something out of network, though usually at a lower effective rate. How much that difference costs you is a bigger topic — see in-network vs out-of-network.
How a DHMO works
DHMO stands for Dental Health Maintenance Organization. Instead of percentages, a DHMO uses a fixed copay schedule: each procedure has a set dollar amount you pay, and there is often no annual maximum. Premiums are typically lower than PPO premiums.
The trade-off is control. You are typically assigned to one contracted dental office and must receive care there; changing offices usually requires a formal transfer that takes effect the following month. Specialist care generally requires a referral, and out-of-network visits are typically not covered at all except in emergencies.
Which model fits urgent major work
If you need a crown, bridge or implant soon, the practical bottleneck is rarely the paperwork — it is access. With a DHMO you depend on one office's schedule and on referral timelines. With a PPO you can call every in-network dentist in your area and book the first available slot. For urgent major work, that flexibility usually matters more than the lower DHMO premium.
One caution that applies to any model: check the waiting period for major services before you enroll. A plan you cannot use for 12 months does not help with a tooth that hurts today.
Why the plans in our catalog are PPO-based
All six plans we currently review and publish use PPO networks: Delta Dental PPO 1500 and Delta Dental PPO No Wait use the Delta Dental PPO network, MetLife PPO Platinum uses MetLife PDP Plus, Delta Dental PPO Plus Premier uses the Delta Dental PPO and Premier networks, and Guardian Achiever 2.0 and Guardian Core 2.0 use the Guardian PPO network.
The reason is the audience we serve: people who typically need real treatment — often major work — and want to keep their choice of dentist. Five of the six plans have no waiting period on major services; MetLife PPO Platinum is the exception with a 12-month wait on major work. You can filter by your own situation in the plan finder.
A worked example (hypothetical)
Hypothetical: you crack a molar and need a crown within a few weeks. With a DHMO, you would call your assigned office, pay a fixed copay from the plan's schedule — say $400 — and wait for an opening; switching offices usually takes effect the next month. With a PPO paying 50% on a $1,600 negotiated fee, you could book any in-network dentist with an open slot and pay about $800, deductible aside. The DHMO may cost less on paper; the PPO typically gets you into a chair sooner, with a dentist you chose.
What to ask your dentist or carrier
- Is this plan a PPO or a DHMO, and can I see the provider directory before enrolling?
- If it is a DHMO: which office would I be assigned to, and how do specialist referrals work?
- If it is a PPO: what percentages apply to preventive, basic and major services, and is there a waiting period?
- What happens if I visit a dentist outside the network — is anything paid at all?
- How many network dentists actually accept new patients in my ZIP code?
Educational summary — not a guarantee of coverage. Plan documents control.