BUSINESS BITES - PPO (Preferred Provider Organization)
Dental PPOs are by far the dominant form of commercial dental coverage, about 89% of commercial dental plan enrollment, according to the National Association of Dental Plans. That means most of your patients carry one, and most practices participate in at least a few. Yet many owners couldn’t say with confidence whether a given PPO is helping the practice or quietly draining it. The decision to join, or drop, a plan is among the most consequential financial choices a practice makes, and it’s too often made on autopilot. Here’s how dental PPOs actually work, the economics underneath them, and how to evaluate the ones you’re in.
What a PPO actually is
PPO stands for Preferred Provider Organization. It’s a network model: the insurer contracts with a group of dentists who agree to accept reduced, negotiated fees in exchange for being listed as in-network. That’s the entire trade in one sentence — you give up some reimbursement per procedure in return for access to the plan’s patients. Members have a financial incentive to stay in-network (a bigger benefit and lower out-of-pocket cost) and receive a smaller benefit when they go to a non-contracted dentist. That cost difference is the lever the plan uses to steer patients toward its network.
How a PPO differs from the other plan types
It helps to see where a PPO sits among the alternatives:
Indemnity (traditional fee-for-service): No network. The plan pays a percentage of a “usual, customary, and reasonable” allowance, you bill your full fee, and the patient chooses any dentist freely. (We covered the problems with UCR in a previous issue — Read Here.)
DHMO (dental HMO / capitation): You receive a fixed monthly payment per assigned patient regardless of how much treatment they need, and the patient must use their assigned dentist. It’s the most restrictive model.
PPO: The middle ground — and, by a wide margin, the most common. A network built on negotiated fee-for-service discounts, with out-of-network care still permitted at a higher cost to the patient.
The mechanics for your practice: the agreement and the fee schedule
When you join a PPO, you sign a participating provider agreement and accept the plan’s fee schedule — a fixed, discounted dollar amount for each procedure code. The gap between your full fee and the contracted fee becomes a mandatory write-off that you cannot bill to the patient. If your full fee for a crown is $1,400 and the plan’s contracted fee is $950, you write off $450 and collect $950 total, split between the insurer’s portion and the patient’s portion. That PPO write-off, often 20% to 40% or more off your full fee, is the true cost of participation, and it applies to every procedure for every patient on that plan.
One caution before you ever sign: the ADA points out that these contracts are drafted by the payer and may contain terms that favor the payer over the dentist, so the agreement should be read and understood in full first.
In-network vs. out-of-network
In-network, you bill your full fee, the plan applies the contracted rate, and you write off the difference — no balance billing the patient. Out-of-network, the plan reimburses against its out-of-network allowance (frequently UCR-based), the patient may owe the balance, and you can balance-bill subject to your state’s law. Because patients pay meaningfully less in-network, lower coinsurance and deductible, the structure is designed to channel them to participating dentists. Many PPOs also use utilization review to monitor the treatment patterns of their network dentists.
The economics: why dentists join, and the trade-off
The honest framing is that a PPO is a volume-for-discount trade, and whether it’s a good one depends entirely on your situation.
The upside is patient flow. Plan members are steered toward in-network dentists, and many simply won’t go out-of-network. For a newer practice, a practice with open chair time, or one in a saturated market, filling the schedule can easily justify the discount — an empty chair earns nothing at all.
The cost is the write-off on everything. You’re discounting every procedure for those patients. Volume goes up, margin comes down. And if you’re already at capacity, PPO patients can crowd out full-fee patients at a discount — the worst version of the trade.
The useful question is never “are PPOs good or bad?” It’s whether the volume a specific plan brings is worth the specific discount it demands, given your capacity right now.
The trap worth knowing: network leasing (“silent PPOs”)
This is the one that catches dentists off guard. Many participating agreements contain an affiliated carrier clause that lets a plan lease or rent your contracted fees to other payers you never signed with. The ADA describes the mechanic plainly: you sign with Network A, Network A leases to Network B, and suddenly you're "in network" with Network B even though you never signed with them. Worse, some arrangements don’t notify the dentist at all — you treat a patient expecting your full fee, then receive an explanation of benefits showing a reduced fee and a prohibition on balance billing.
About 30 states have passed legislation on network leasing, with some allowing dentists to opt out and others requiring advance notice. Read every agreement for assignment and leasing language, and if you discover you’ve been pulled into a leased plan you didn’t choose, contact the carrier you actually signed with and ask about opting out.
How to evaluate participation — before and after you sign
The ADA’s guidance here is refreshingly concrete. Before signing on with any plan, review the demographics of your current patient base, the demographics of the potential new patient base, your available capacity to treat new patients, and the financial implications of the offered fee schedule. In practical terms:
Calculate the real write-off percentage for each plan - your full fees against the contracted fees, across the procedures you actually perform most.
Quantify what each plan delivers - the patient count and the production attributable to it.
Weigh that against capacity — open chair time makes a discounted patient worthwhile; a full schedule makes that same patient a substitute for full-fee work.
Model leaving versus staying — when you drop a plan, some patients stay out of loyalty or out-of-network benefits and some leave; estimate which.
And don’t evaluate a contract blind. ADA members can use the free Contract Analysis Service, which provides a plain language explanation of an agreement’s terms (it doesn’t offer legal advice or tell you whether to sign). Keep in mind, too, that some plans carry time consuming credentialing requirements before you can join.
Don’t set it and forget it
Two final points worth taking to heart. First, terms are negotiable: dentists can try to negotiate before signing and renegotiate later, including fee-schedule increases — though any such negotiation must be done individually between you and the plan, never collectively with other dentists. Second, because these contracts are payer drafted and can change, the ADA’s Council on Dental Benefit Programs recommends reviewing your signed agreements every year. A plan that made sense when you opened your doors with open chairs may make far less sense once you're booked solid.
A PPO isn’t inherently good or bad. It’s a trade of fee discounts for patient volume, and the right answer depends entirely on your capacity, your market, and the actual numbers behind each plan. The practices that come out ahead treat participation as an active, data-driven decision they revisit on a schedule, not a stack of agreements they signed once and never looked at again. Inventory your plans, calculate the true write-off and the true volume each one delivers, watch your contracts for leasing language, and review the rest with your dental CPA at least once a year.
