PPO Write-Offs and Fee Schedules: What They Cost Your Practice

Joining PPO networks is one of the fastest ways to fill a schedule, and one of the slowest ways to grow a margin. Each plan pays a contracted fee that is usually below your office fee, and the difference is written off. That trade can make sense, but many practices never measure what each plan actually costs. This guide shows how to do that, how to test whether a plan is profitable, and how to decide between staying, renegotiating and leaving.

How PPO write-offs work

When you join a network, you agree to accept the plan’s maximum allowable fee as the total charge for covered services. If your office fee for a crown is $1,400 and the plan allows $950, you write off $450. The plan pays its share of $950, and the patient pays the rest of $950. Those contractual write-offs reduce gross production to what the practice can actually collect. The collection rate guide explains why they should be tracked separately from discretionary adjustments such as courtesy discounts.

Key terms on a fee schedule

• Office fee (UCR). Your own usual fee for a procedure, the same for every patient.
• Allowed fee. The maximum the PPO contract lets you collect for that code from the plan and patient combined.
• Write-off. Office fee minus allowed fee. It is never billed to the patient for a covered service.
• Patient portion. Allowed fee minus what the plan pays, based on its coverage percentage, deductible and annual maximum.

Posting PPO fees: write-off method or fee schedule method

Practice management software usually supports two ways to record PPO work. Both end with the same collected dollars; they differ in what your reports show.

Whichever you use, the fee schedules loaded in the software must match the current contracts. An outdated schedule produces wrong patient estimates, surprise balances after the explanation of benefits arrives, and credit balances you later have to refund. Updating fee schedules belongs on the front-desk checklist in our guide to dental insurance verification.

Measure the effective fee by plan

The useful number is not the plan’s reputation; it is what it pays for the procedures you do most. Pull a production-by-code report for the last 12 months and list your 15 to 20 most common procedures. Then compare each plan’s allowed fee to your office fee.

These are illustrative numbers, not real plan fees. In the example, the gap between Plan A and Plan B on the adult prophy alone is $12 per visit. Across 1,700 visits that is $20,400 a year from one code. Multiply across all codes and the difference between two plans can be larger than many owners expect.

Calculating the weighted write-off per plan

Once you have allowed fees for your most common codes, a single figure per plan makes comparison easy:

Weighted write-off % = (total office fees − total allowed fees) ÷ total office fees, using the same annual volume for each code

Using the table above, the year’s volume at office fees comes to $788,500. Priced at Plan A’s allowed fees, the same work is worth $480,400, a weighted write-off of about 39%. At Plan B’s fees it is worth $550,400, about 30%. The nine-point gap equals roughly $70,000 a year on this volume of work. A simple average of the five codes’ discounts would hide that, because it gives the crown the same weight as 1,800 exams.

Run the same calculation for every plan, then rank them alongside how many active patients each plan brings and how much of your production it represents. A plan with a high write-off and few patients is the easiest to drop; a plan with a high write-off and many patients is the one worth renegotiating.

Is a plan profitable? The chair-hour test

A write-off percentage tells you how big the discount is, not whether the plan covers your costs. For that, compare what a plan pays per hour of chair time with what an hour of chair time costs you.

1. Take annual overhead, excluding owner dentist pay and loan principal. Example: $900,000.
2. Divide by scheduled chair hours. Example: 4 operatories × 32 hours × 48 weeks = 6,144 hours, so about $146 per chair hour.
3. Price a typical hour for that plan. Example: a one-hour adult recall visit under Plan A (exam $45 + prophy $80) pays $125, or $175 in the visit that includes bitewings.
4. Compare. Most of Plan A’s recall hours pay less than the $146 the hour costs; under Plan B the same visit pays $144 to $202.

This is a rough test: hygiene and doctor chairs carry different costs, and a recall visit leads to restorative work that may be profitable. But if a plan’s typical hour pays below your cost per chair hour, the full schedule it brings is not helping your margin. Our dental overhead calculator helps you build the overhead figure for step one.

What else a PPO costs

• Front-desk time for verification, pre-authorizations, claims and appeals.
• Payment delays that tie up cash. See managing cash flow.
• Downgrades and alternate-benefit clauses that pay for a cheaper procedure than the one performed, such as an amalgam benefit on a posterior composite, leaving a patient balance to collect.
• Frequency limits, waiting periods and bundling rules that turn expected insurance payments into patient balances or write-offs.
• Card-processing fees when a plan pays by virtual credit card instead of direct deposit.
• Retroactive recoupments, where a plan takes back a payment it already made by offsetting future payments.
• Schedule time used by lower-fee patients that could serve higher-fee patients if demand allows.

Against that, a PPO can bring a steady flow of new patients, especially for a new practice. The question is not whether PPOs are good or bad; it is whether each plan pays enough, for the patients it brings, to cover your costs and leave a margin. Watch the insurance aging report by plan too: a plan that pays slowly or denies often costs more than its fee schedule suggests.

Comparing your options

Renegotiating a fee schedule

Some plans will review fees on request, particularly for practices in areas with fewer participating dentists or with strong quality and retention numbers. Responses can take months, and many contracts only allow changes at renewal, so read the term and renewal dates first. Before asking:

1. Know your volume and production by plan for the last 12 months, and when the fee schedule was last updated.
2. Review your own office fees first, so the comparison is against a current UCR fee.
3. Identify the 10 to 20 codes that matter most to you and propose specific fees for them.
4. Explain what is distinctive about your practice: hours, location, services, languages, technology.
5. Put the request in writing and keep a record of every response.
6. Decide in advance what you will do if the answer is no, and set a reminder to review each plan at least once a year.

Leaving a network: run the break-even first

Before dropping a plan, estimate how many of its patients need to stay for collections to hold steady. An illustrative example using Plan A’s 39% weighted write-off:

If more than about six in ten patients stay, collections from that group can hold steady with fewer visits, which frees chair time for new patients and lowers supply and lab spending. If fewer stay, the practice needs new fee-for-service patients to fill the gap. The calculation ignores collection risk: out-of-network patients pay a larger share themselves, so expect more patient balances, and have your financial policy and payment options ready.

Read the contract’s termination clause first; many require advance written notice and set rules for treatment already in progress. Plan how you will tell affected patients and what you will offer them, such as an in-house membership plan (have counsel confirm how Virginia treats your plan design before launching one). Track how many patients stay so you know whether the decision paid off. Dropping networks is easier when your marketing brings in fee-for-service patients; see attracting the right patients.

Many practices leave networks in stages rather than all at once: drop the lowest-paying plan with the fewest patients first, measure how many patients stay over six to twelve months, then decide on the next one. That limits the risk to collections and gives the team time to get comfortable explaining out-of-network benefits. Patients with out-of-network coverage can often still use their benefits; the difference is that they pay the office fee and the practice may need to help them file for reimbursement. A cash reserve helps cover the months while the schedule refills.

What Virginia law says about fees

Under Va. Code § 38.2-3407.17, a contract between a dental plan and a dentist generally cannot set the fee the dentist must accept for services that are not covered services under the plan. The statute defines covered services to include services the patient pays for after the plan’s annual or periodic maximum is reached, so the contracted fee can still apply in that situation. The same section requires reimbursement for covered services to be reasonable rather than nominal.

A related statute, Va. Code § 38.2-3407.17:1, covers “network leasing,” where your contract with one plan is used by another carrier. Access is allowed only if your provider contract expressly permits it and affected dentists are notified, and the carrier must pay under the fee schedule in your contract. If an explanation of benefits shows a discount from a plan you never signed with, that section is the place to start.

Virginia’s carrier fair-business-practices statute, Va. Code § 38.2-3407.15, requires provider contracts with regulated carriers to include minimum claim standards. Among them:

• Clean claims must generally be paid within 40 days of receipt, and the carrier must flag defects within 30 days.
• A carrier that pays by a method carrying a processing fee, such as a virtual card, must say so in the contract and offer a fee-free alternative.
• Retroactive denials and recoupments are limited, generally to 12 months after payment unless fraud or duplicate payment is involved or the contract allows otherwise, with 30 days’ advance notice.
• Contract amendments generally take effect only after 60 days’ notice, giving you a window to decide whether to terminate.

Some parts of that statute exclude stand-alone dental plans, and self-funded employer plans may fall under federal rules instead, so have your contracts reviewed before relying on any of these provisions or changing your billing.

Review your own office fees too

PPO write-offs are measured against your office fee, so the fee schedule itself needs attention. Many practices leave office fees unchanged for years, which shrinks the apparent write-off while also undercharging fee-for-service patients and out-of-network patients whose plans pay a share of your fee. Review office fees at least annually, by code, against your local market and costs. Keep one office fee schedule for all patients and let PPO contracts set the allowed fee; your attorney or advisor can explain why charging different office fees to different payers creates problems.

Payer mix also shows up when you sell: buyers look at how much of production turns into cash. See how dental practices are valued. If you are still building a patient base, read credentialing with dental insurance before you open before deciding which networks to join.

An annual PPO review checklist

• Production, collections, write-offs and active patients by plan for the last 12 months.
• Weighted write-off % per plan on your top 15–20 codes.
• Typical hourly payment per plan compared with your cost per chair hour.
• Average days to payment and denial rate per plan from the insurance aging report.
• Contract renewal and termination-notice dates.
• Office fees reviewed and fee schedules in the software matched to current contracts.
• A decision for each plan: keep, renegotiate or plan an exit.

Getting a clear picture

Most practices know which plans feel low but have never put the numbers side by side. Cisor’s Cisor Metrics practice analysis breaks production and write-offs down by plan and code so you can decide which to keep, renegotiate or drop. Request a practice analysis or call (703) 345-0606.