PPO vs DHMO Dental Plans: How Each One Pays

A dental PPO and a dental DHMO are two different answers to the same question: how should the plan decide what it owes? A PPO answers with a percentage of an allowance and puts a ceiling on the year. A DHMO answers with a fixed price per procedure and usually has no ceiling, because it never promised you a pot of money in the first place.

Almost everything else people say about the two follows from that one difference, so it is worth getting straight before the acronyms start.

What a PPO does with a bill

A PPO pays a share of an allowed fee, and the share depends on which category the treatment falls into. That is why a PPO's schedule of benefits is a table rather than a price list.

The 2026 BCBS FEP Dental brochure, published by the US Office of Personnel Management, is a clear worked example of the type. It sorts treatment into Class A — oral examinations, prophylaxis, diagnostic evaluations, sealants and radiographic images; Class B — restorative work such as fillings, stainless steel crowns, scaling and root planing, extractions and denture adjustments; Class C — root canals, periodontal surgery, crowns, oral surgery, bridges and complete dentures; and Class D, orthodontics. Each class carries its own member share, and each share is different in network and out of it.

Because the plan is paying out of a defined budget, that budget has an edge. The same brochure caps its Standard Option at $1,500 in network and $750 out of network for the plan year, while its High Option carries no in-network annual maximum at all.

What a DHMO does instead

A DHMO does not pay a percentage; it agrees a price. You are assigned to a participating practice, and a schedule lists what each procedure costs you there as a fixed copayment — a number, not a proportion. The plan's arrangement with the dentist, not a claim after the fact, is what makes the price low.

The National Association of Dental Plans describes the split in exactly those terms: most plans cover 100% of preventive care and apply copayments, either as a dollar amount in DHMOs or as a percentage in dental PPOs and indemnity plans, to other levels of care. It also notes that DHMOs rarely have an annual maximum, and reported that 88% of DHMO enrollees had no annual maximum in its 2024 data, up from 78% the year before.

Deductibles behave differently too. The NADP says nearly all DHMOs have deductibles under $25, while only 28% of dental PPO deductibles are at that level — and that PPO deductibles are usually between $50 and $100, with about 46% falling between $50 and $99.

The trade, stated plainly

A DHMO buys you certainty about price and spends your freedom about dentists. A PPO buys you freedom about dentists and spends your certainty about price.

That is the whole trade, and which side of it you want is a question about your life rather than about dentistry. If you have a dentist you will not leave, a DHMO that does not include that practice is not a cheaper plan; it is a plan you cannot use without paying twice. If you move often, or your children see a different practice from you, the flexibility of a PPO may be worth its percentages.

The cap is the other half. A DHMO with no annual maximum does not run out partway through a treatment plan, which is a real advantage in a year with a lot of major work. A PPO with a generous maximum — or none, as in the BCBS High Option in network — achieves the same thing by a different route and usually at a higher premium.

Things people get wrong about both

"The PPO percentage is off what my dentist charges." It is off the plan's allowance for that procedure, which may be less than the fee. That is why the same brochure prints its coordination-of-benefits examples in terms of a plan allowance rather than the dentist's bill, and why out-of-network care can cost more than the percentage suggests.

"A DHMO copay is the whole price." It is the price for the procedures on the copayment schedule at a participating dentist. Anything not on the schedule, and anything done elsewhere, is outside the arrangement.

"No annual maximum means no limits." It means no dollar ceiling. Frequency limits, replacement intervals and exclusions still apply, and those are the rules that quietly decide whether a second crown in four years is covered.

"In network and out of network differ only a little." In the BCBS brochure they differ on three axes at once: the coinsurance, the deductible and the annual maximum are all worse out of network on both options. Three small differences compound into a large one.

A third shape you may be offered

Indemnity or "traditional" dental cover works like a PPO in how it pays — a percentage of an allowance, with a cap — but without a network steering you. The NADP says most dental indemnity products' annual limits parallel those of dental PPOs, so the ceiling behaves similarly even where the network does not exist.

If a plan you are offered does not obviously match any of these three shapes, that is your cue to stop reading the marketing page and open the schedule of benefits, where the shape is always visible in how the member's share is written: a percentage, a dollar copay, or nothing at all for routine work.

How to compare two plans in ten minutes

Put the two schedules side by side and read four rows, in this order.

1. The routine tier. If both pay it in full in network, this row is a tie and you can stop weighting it.
2. The tier your actual treatment sits in. Compare a percentage against a dollar copay by applying both to the real procedure — you will need your dentist's fee for the PPO side.
3. The annual maximum. If one plan has none, ask what the premium difference buys you in a year where you need three crowns.
4. The network. Check the specific practice, by name, on the plan's own directory, not on a third-party list.

If that exercise shows you do not want a payer at all — only a lower price — then the product you are looking for is structurally different, and dental insurance versus dental discount plans sets out what that difference costs you. If both plans you are weighing have a wait before major work, how dental waiting periods work is the next thing to read.