Dental Predeterminations: See What Insurance Will Pay Before You Book

Few things sting like getting an insurance statement weeks after a crown or bridge and discovering the plan paid far less than you expected. Often it wasn't a mistake. It was a rule in your policy that nobody mentioned, applied after the fact. The good news is that most dental plans give you a way to find out what they'll pay before any work starts.

That tool goes by different names: predetermination, pre-treatment estimate, pre-estimate or prior authorization. This guide explains how to request one, how to read the response, and how to spot one of the most common reasons for a smaller-than-expected payment, the "alternate benefit" or "least expensive alternative" clause.

What a Predetermination Is (and Isn't)

A predetermination is a request your dental office sends to your insurer before treatment. It lists the procedures your dentist recommends, usually with procedure codes, fees and supporting X-rays or notes. The insurer reviews it and sends back an estimate of what it would pay under your plan.

It's not a guarantee. Most insurers word their responses carefully: the estimate depends on your eligibility on the date of service, how much of your annual maximum is left, and the information submitted. If you use other benefits in the meantime or your coverage changes, the actual payment can differ. Still, it's by far the best preview you can get.

Predetermination vs. prior authorization

The terms are sometimes used interchangeably, but there can be a difference. A predetermination is often optional: you can go ahead without it and the claim will be processed afterward. A prior authorization may be required by some plans for certain services, and skipping it could mean the plan won't pay at all. Check your plan documents or call the insurer to find out which applies to the treatment you need.

When It's Worth Asking For

For a routine cleaning, a predetermination is usually overkill. It earns its keep for:

• Crowns, bridges, inlays and onlays
• Dentures, partials and implants
• Root canals, especially on back teeth or re-treatments
• Gum treatments such as scaling and root planing
• Any treatment plan where your share could run into hundreds of dollars or more
• Anything your plan has previously denied or paid less on than expected

How to Request One

1. Ask the office to submit it. Say something simple: "Before we schedule, could you send a predetermination to my insurance for this treatment plan?"
2. Ask what's being submitted. The list of procedure codes, the fees, and which X-rays or notes are attached. Thin documentation is a common reason for a lowball estimate.
3. Get a copy of the treatment plan with codes and fees for your own records.
4. Note the date it was sent and ask the office roughly how long responses usually take with your insurer.
5. Read the response yourself when it comes back, rather than relying only on a phone summary.

How to Read the Response

Predetermination responses look a lot like an explanation of benefits. For each procedure, look for these columns or fields:

The Alternate Benefit Clause, Explained

Many dental policies include a clause that lets the insurer pay based on a less expensive treatment that would also address the problem, even if you and your dentist choose a more expensive one. You'll see it called an "alternate benefit," "least expensive alternative treatment" or "LEAT," or "optional treatment" provision, depending on the insurer.

How it plays out

Imagine a hypothetical case: your dentist recommends a tooth-colored filling on a back molar. Your plan's alternate benefit clause says it will pay as if a silver (amalgam) filling had been done instead. The plan applies its coverage percentage to the lower amalgam allowance, and you pay the rest, including the difference between the two.

The same logic can apply to bigger decisions, such as an implant where the plan pays as if a bridge or partial denture were placed, or a crown where the plan bases its payment on a less costly crown material. Whether and how your plan does this is entirely down to your policy wording.

How to spot it on a predetermination

• The processed procedure code differs from the submitted code.
• A remark mentions "alternate benefit," "least costly," "optional treatment" or similar.
• The allowed amount is much lower than you'd expect for the service you're getting.

What You Can Do About a Disappointing Estimate

Ask your dentist whether more documentation would help

Sometimes an estimate is low because the insurer didn't see why the more involved treatment is needed. A narrative explaining, for example, the size of the cavity or the condition of the tooth, plus clear X-rays or photos, may change the answer. Ask the office whether resubmitting with more detail makes sense.

Ask the insurer to explain in writing

If a remark code isn't clear, call and ask what policy provision was applied. Request the explanation in writing or note the call reference number.

Look at the appeal process

Plans have a process for disputing decisions, described in your plan documents. If you have an employer plan, your HR or benefits contact may be able to help you understand it.

Decide with real numbers

Sometimes the clause applies fairly and the estimate stands. At that point you have options:

• Go ahead with the recommended treatment and pay the larger share, knowing exactly what it will be.
• Ask your dentist whether the alternative the insurer based its payment on is clinically acceptable for you.
• Get a second opinion on the treatment plan itself.
• Price the work as a cash patient elsewhere, including dental schools or treatment abroad, and compare it with your patient portion at home.

What to say when you call the insurer

Calls go better with a short script. Have the predetermination in front of you and try something like: "I'm looking at a pre-treatment estimate for [procedure] on tooth [number]. The processed code is different from what my dentist submitted. Can you tell me which provision of my plan was applied, and where it appears in my plan documents?" Write down the representative's name, the date and any reference number before you hang up.

Other Rules That Show Up on Predeterminations

• Frequency limits: plans often restrict how often a service is covered, such as one crown per tooth in a set number of years.
• Missing-tooth clauses: some plans won't pay to replace a tooth lost before you joined the plan.
• Waiting periods: newer members may not yet be eligible for basic or major services.
• Annual maximum: an estimate may assume your full maximum is available; if you use benefits elsewhere first, there may be less left.

If any of these appear, it's another reason to have the predetermination in hand before you book.

A One-Page Checklist

1. Ask for a predetermination on any treatment where your share could be significant.
2. Get your own copy of the treatment plan with codes and fees.
3. When the response arrives, compare submitted and processed codes line by line.
4. Read every remark for alternate benefit, frequency, missing-tooth and waiting-period notes.
5. Check your remaining annual maximum.
6. If the numbers disappoint, ask about resubmitting with more documentation, then compare options before you book.

The Bottom Line

A predetermination turns an insurance surprise into a planning step. It won't make your coverage bigger, but it shows you exactly where your plan's limits are, including clauses like alternate benefits that are easy to miss. Ask for one before major work, read it line by line, and make your treatment and money decisions with the real numbers in front of you.