Predetermination: what your plan will pay, in writing

A predetermination is a written request sent to an insurer before treatment, asking what the plan expects to pay toward a specific planned procedure on a specific patient. Some plans call it a pre-treatment estimate, a pre-treatment review or a benefit estimate. The plan reads the submitted codes and supporting records, applies the policy, and replies in writing with the benefit it anticipates allowing.

The name varies and the mechanism does not. A pre-treatment estimate, a pre-treatment review, a benefit estimate and a predetermination of benefits are the same document under different plan vocabularies. What matters is that the request is made before treatment, names the exact procedures, and asks a question the plan answers in writing rather than over the telephone. A verbal quote from a member services line is not a predetermination, is not recorded against your claim, and will not be honoured as one.

A predetermination is also distinct from prior authorisation, which some plans require for particular procedures and which carries more weight. Where a plan mandates prior authorisation and the surgery goes ahead without it, the benefit can be reduced or refused outright on that ground alone. A predetermination is voluntary and advisory: nothing is lost by skipping it except the information. Most dental plans do not require prior authorisation for third molar removal, but some medical plans do where the surgery would be billed on the medical side, so it is worth establishing which of the two you are dealing with before anything is sent.

Almost nobody asks for one. Predetermination is not advertised, it is not offered at the front desk of most practices as a matter of routine, and the plan has no particular incentive to volunteer it. For a patient facing surgery at a practice outside their plan's network, it is the single most useful piece of paperwork available, and it costs a stamp and a wait.

No. A predetermination is an estimate of benefits, not a commitment to pay. Nearly every response carries language to that effect, and it is not boilerplate to skim past. Payment remains subject to eligibility on the date of service, to the benefit amounts still unused at that point, to any waiting period written into the policy, and to what the surgical record shows was actually performed.

The gap between a predetermination and a payment is not usually the plan changing its mind. It is the facts changing underneath the answer. A predetermination is priced against the policy as it stands on the day it is issued and against the benefits unspent at that moment. Six weeks later the deductible may have moved, the annual maximum may have been partly consumed by other treatment, employment may have ended, or the plan year may have rolled over and reset the whole calculation.

• Eligibility on the date of service. A predetermination says nothing useful if cover has lapsed by the time the surgery happens, and lapsed cover is the most complete way for a favourable answer to become worth nothing.
• Benefits used in between. A crown, a root canal or a course of periodontal treatment in the intervening weeks draws down the same annual maximum the predetermination was priced against.
• The plan year rolling over. A response issued in December against this year's remaining benefit describes December, not January.
• What was actually done. The plan pays against the codes on the claim, not the codes on the request. A tooth planned as a soft-tissue impaction that turns out to be fully bony is a different code with a different benefit.
• Documentation that does not travel. The narrative and radiographs sent with the predetermination do not always reach the claim file. Assume they need sending twice.
• A second policy. Where two plans cover the same patient, the order of payment changes what each one actually contributes.

None of that makes a predetermination worth skipping. It makes it worth reading with its assumptions visible. A response saying the plan will consider a given code at a given percentage, subject to a stated deductible and a stated remaining maximum, has told you the three variables that decide the outcome. Keep those three stable and have the surgery within a few weeks, and the payment usually lands close to where the response said it would.

A complete submission carries three things: the procedure codes for exactly what is planned, current radiographs showing the teeth in question, and a written narrative explaining why the surgery is indicated. Add the patient and subscriber details, the surgeon's identifiers and the anticipated date of service, and the plan has what it needs to assess the request without writing back for more.

The codes

Third molar removal is not one code. The dental code set distinguishes an erupted tooth, a soft-tissue impaction, a partially bony impaction and a completely bony impaction, and plans price those categories differently — often at different benefit percentages, because some policies treat surgical extraction as a major service and simple extraction as a basic one. A request that says only that a wisdom tooth is coming out will be answered against a code nobody intends to bill, and the answer will be wrong in a direction you only discover afterwards. Ask that the request names the specific code planned for each tooth.

Anesthesia is billed under its own separate codes and is frequently reviewed under different rules from the surgery itself, sometimes by a different department. If anesthesia is part of the plan for the day, it belongs in the predetermination request explicitly. Leaving it out produces a response that answers only half the question.

The radiographs

A panoramic radiograph is the usual attachment, and a cone beam scan may be included where one has been taken and the anatomy is the point at issue. The plan is looking for visible evidence supporting the code claimed — the angulation of the tooth, its relationship to bone, and any associated radiolucency. Images should be recent, legible and date-stamped. A reviewer who cannot see the impaction on the film will not take the code on trust.

The narrative

The narrative is the part that changes answers, and it is the part most often omitted. It is a short written account, sometimes only a paragraph, of what the imaging showed, what symptoms or findings exist, and why the surgery is indicated now rather than at some indefinite later date. A code with no narrative is a claim of fact with nothing behind it. A code with a narrative gives a reviewer something clinical to weigh.

• The tooth or teeth by number, and the code planned for each.
• What the radiograph shows: angulation, depth, bone coverage, proximity to the nerve canal or the sinus.
• Symptoms and clinical findings, with dates. Recurrent pericoronitis twice in a year reads differently from a routine screening finding.
• Any pathology visible on imaging, such as a radiolucency around the crown or resorption of the tooth in front.
• Why now. A plan reviewer distinguishes documented disease from an asymptomatic tooth, and the distinction usually decides the benefit.
• Whether the request is being sent to the dental plan, the medical plan, or both.

One honest caveat about narratives: they do not manufacture coverage that the policy does not contain. Where a plan excludes a service outright, no amount of clinical writing changes that, and a reviewer will say so. The narrative works on questions of necessity and coding, not on questions of exclusion.

Most plans respond to a predetermination in two to four weeks from receipt, and a straightforward electronic submission can come back inside ten days. Paper submissions, requests missing a radiograph, and cases routed to a dental consultant for clinical review all run longer — six weeks is not unusual, and a request that goes back and forth once for further records can take two months end to end.

Work backwards from the date that actually constrains you. A student who has to have the surgery in a specific recess week, a patient whose plan year resets at the end of December, and someone travelling in six weeks are all working to a deadline that a two-month paperwork cycle will miss. Send the request as soon as the surgical plan is settled, not once the date is booked.

It is also worth asking the plan how long a predetermination remains valid. Many state a window on the face of the response, commonly somewhere between sixty days and a year, after which the estimate is treated as stale. That window is one of the few hard facts on the document, and it tells you how much scheduling freedom the answer actually buys.

Read a predetermination response line by line against the codes that were submitted, rather than looking for a single number at the bottom. The document lists each planned procedure, whether the plan treats it as a covered benefit, the amount the plan will consider for it, the percentage it applies to that amount, and the deductible and annual maximum it expects to charge against. The figure most people fixate on is the allowed amount, and the allowed amount is not what will be reimbursed.

The commonest misreading is treating the allowed amount as the reimbursement. It is not. It is the base the percentage is applied to, after any deductible, and only then is a benefit produced. Where a practice is outside the plan's network, the allowed amount is set by the plan's own out-of-network schedule rather than by what the surgeon charges, and the difference between the two is the patient's to carry. Our note on what out of network actually means sets out how those allowances are constructed.

Alternate benefit, and other quiet reductions

Many dental policies contain an alternate benefit provision: where the plan considers a less involved procedure clinically adequate, it pays toward that one instead. On a predetermination this appears as a code you did not submit, sitting where your code should be — a surgical extraction answered with a simple extraction benefit, for example. Nothing is denied and nothing is flagged, and the number is simply smaller than expected. Read the returned codes against the submitted codes and the substitution is obvious. Read only the bottom figure and it is invisible.

Two other reductions hide in plain sight. A frequency or waiting-period limitation may mean a benefit exists but is not yet available to this patient. And a missing-tooth or pre-existing-condition clause occasionally applies where treatment was planned before the policy began. Both are stated on the response, usually in a footnote keyed to a letter beside the line.

Three documents get called an estimate and only one of them comes from the party that actually pays. Confusing them is how a patient ends up believing a number has been agreed when nobody with the authority to agree it has seen the case.

The distinction that matters most is the last row. An estimate produced by a dental practice is a forecast: it combines the practice fees with whatever the practice has been able to learn about your benefits, usually from an electronic eligibility check that returns categories and percentages rather than case-specific decisions. It is made in good faith and it is frequently accurate, but the practice is not the payer, has not seen your policy document, and cannot bind a plan to anything.

A predetermination is the plan speaking about your case. That is a different kind of statement, even though it is also labelled an estimate, and it is the only one of the three where the party with the money has looked at your radiographs. Our note on why estimates differ from final bills covers what moves a number between the two.

There is a fourth document worth naming so you do not mistake it for any of these: a benefits summary or eligibility response. That is the plan telling you the shape of your policy — percentages by category, the annual maximum, the deductible, waiting periods. It is useful and it is instant, but it is generic. It answers what the policy says, not what the policy does with your teeth.

A predetermination matters more when the practice sits outside your plan's network, not less, because the money moves in the opposite direction. Where a practice holds a contract with your plan, the plan pays the practice directly at a contracted rate and the practice absorbs the difference between its own fee and that rate. Outside the network there is no contracted rate and usually no direct payment: you pay the practice, you submit the claim, and the plan reimburses you afterwards.

That reversal moves three separate risks onto the patient at once. You carry the timing risk, because you have paid and are waiting. You carry the amount risk, because the out-of-network allowance is set by the plan rather than negotiated, and the difference is yours. And you carry the administrative risk, because a claim that stalls for a missing narrative is your claim to chase. A predetermination addresses the second of those before you commit to any of them.

• You are usually the one submitting, so you are also the one who benefits from knowing what will come back.
• The reimbursement arrives after the surgery is paid for, which makes the size of it a planning question rather than a billing question.
• Out-of-network allowances vary widely between policies that look identical from the outside, and a percentage alone tells you very little without the allowance it applies to.
• The annual maximum is shared across all dental treatment in the plan year, so a predetermination is also a statement about what is left for everything else.
• Where a plan has an out-of-network deductible separate from the network one, the response is often the first place a patient sees it.

The honest version of this argument includes the outcome nobody advertises. Sometimes the response comes back and the number is small — the plan considers the code at a low allowance, the deductible is untouched, or most of the annual maximum has already gone. That is real information, and it is better held before surgery than after. Some patients will look at it and decide to have the treatment at a practice inside their network instead. A predetermination exists to make that decision possible, and a practice that only wants you to see the answer when it is favourable is not giving you the document for your benefit.

Others will look at the same number, weigh it against the surgeon, the anesthesia option and the timing they want, and go ahead knowing exactly what they are carrying. Both are informed decisions. Neither is available to someone who finds out in week eight.

A predetermination is a paperwork process, and disease does not observe paperwork timelines. Where there is spreading infection, a swelling that is closing the mouth or tracking toward the eye or the floor of the mouth, fever alongside facial swelling, or difficulty swallowing, the surgery is treated on clinical grounds and the insurance question is dealt with afterwards. Waiting three weeks for a benefit estimate in that situation is a clinical error, not a financial strategy.

There are also situations where a predetermination will simply confirm what a five-minute telephone call already establishes, and waiting for it wastes weeks for nothing.

• The annual maximum is already spent. Ask what remains before requesting anything else; our note on what deductible remaining means explains how to read the answer.
• The policy has a waiting period that has not yet elapsed for major services. That is a date, not a judgement, and the plan will state it on request.
• The surgery is scheduled inside two weeks and the plan is on paper. The response will arrive after the fact.
• There is no dental cover at all, only a discount arrangement. Discount plans are not insurance and issue no predetermination.
• The policy excludes the service outright. An exclusion is a contract term, and a predetermination will restate it rather than reconsider it.

One further case deserves naming. Where the plan year is about to reset and the surgery could reasonably be timed on either side of that line, a predetermination against the current year answers the wrong question. Ask instead what the new year's benefits will be, and time the treatment rather than the paperwork — provided, always, that the tooth is not the thing dictating the schedule.

The response is a working document rather than a verdict. Three things are worth doing with it on the day it lands, and all three take under an hour.

1. Check the codes returned against the codes submitted, tooth by tooth. A substituted code is the commonest silent reduction and the easiest to miss.
2. Note the validity window and the plan year reset date, and put both in a calendar. Those two dates determine how long the answer stays true.
3. Read every footnote and reason code. The letters beside a line carry the limitations, and the key is usually on the reverse or the second page.
4. Take the response back to the practice and ask whether the surgical plan it describes is still the plan. If the imaging has been reviewed again since, the codes may have moved.
5. Ask what happens if the surgery is more involved than planned. A tooth that needs sectioning or bone removal beyond what was anticipated changes the code and therefore the benefit.
6. Keep the response, the radiographs and the narrative together in one place, so the claim can be assembled from a folder rather than reconstructed from memory.

This practice is out of network with every plan, and that shapes how a predetermination works here rather than whether one is available. The request can be prepared at the practice — the planned codes for each tooth, the radiographs, the anesthesia codes and a written clinical narrative — and sent by whichever route the plan accepts. The response comes back to the patient, and any reimbursement after surgery comes to the patient. Our note on claiming reimbursement after oral surgery sets out what the claim itself needs.

What no practice can do is tell you what your plan will decide. The policy is a contract between you and your insurer, written in terms the practice has never seen, and a surgeon who forecasts a payer's decision is guessing with your money. Asking the payer directly, in writing, before anything is booked, is the only way to replace that guess with an answer — and it remains, even then, an answer marked estimate.