A predetermination is a request you or your provider submits to your insurance company before a procedure, asking them to review the treatment plan and estimate how much they’ll cover. It’s most common in dental insurance but also appears in medical plans. Think of it as a financial preview: your insurer looks at the proposed treatment, checks it against your plan’s benefits, and sends back a breakdown of what they expect to pay and what you’ll owe out of pocket.
How a Predetermination Works
Your dentist or doctor submits a predetermination on your behalf, usually by sending the proposed treatment plan along with supporting documentation like X-rays, clinical notes, or a written explanation of why the treatment is needed. The insurer’s review team evaluates the request against your plan’s coverage rules, then returns a statement showing the estimated benefit amount, your expected copay or coinsurance, and whether any portion of the treatment falls outside your coverage.
Processing typically takes anywhere from a few days to a couple of weeks. Major insurers generally complete routine reviews within 5 to 10 business days, though simpler requests can come back in as few as 2 to 3 days. Complex cases involving high-cost treatments or multiple layers of clinical review can stretch to 14 to 21 days. If the situation is urgent, most insurers aim to respond within 24 to 72 hours.
Predetermination vs. Prior Authorization
These two terms get mixed up constantly, but they serve different purposes. A predetermination is primarily a financial estimate. It tells you what your plan is likely to cover so you can plan your budget. A prior authorization (sometimes called precertification) is a requirement from your insurer that a procedure be approved as medically necessary before you receive it. Skip a required prior authorization and your claim could be denied entirely.
Some insurance plans require both. Your plan might need prior authorization to confirm the procedure is medically necessary, and you might separately request a predetermination to understand your costs. Many dental plans recommend predeterminations but don’t mandate them, while medical plans are more likely to require prior authorization for certain services. Your plan documents or a call to your insurer will clarify which applies to your situation.
When You’d Want One
Predeterminations are recommended for any non-emergency dental surgery, prosthetic work, or orthodontic procedure. In practical terms, that means treatments like crowns, bridges, dental implants, root canals, braces, and dentures are all good candidates. These tend to be expensive, and the gap between what you assume your insurance covers and what it actually covers can be significant.
On the medical side, predeterminations are less common but can be valuable for elective surgeries, imaging procedures, or specialty treatments where costs run high. If your provider mentions submitting a predetermination, it’s generally in your interest to wait for the response before scheduling the procedure. A few extra days of waiting can save you from a surprise bill of hundreds or thousands of dollars.
It’s Not a Guarantee of Payment
This is the single most important thing to understand: a predetermination is an estimate, not a binding promise. Insurance companies can still deny or reduce payment when the actual claim comes in. This happens for several reasons. Your plan benefits might change between the predetermination date and the service date. The procedure performed might differ slightly from what was proposed. Or the insurer might later determine the treatment wasn’t medically necessary under their internal policies.
Even prior authorizations, which carry more weight than predeterminations, don’t always guarantee payment. The American Medical Association has pushed back on this practice, arguing that when an insurer gives a green light to medically necessary care, it should be sufficient to guarantee payment. But retroactive denials after approval still happen, and the AMA has formally advocated for federal legislation to prohibit them except in cases of fraud.
In Washington State, regulators have established that a predetermination of benefits is valid for at least six months from the date it’s issued, unless the insurer and provider agree to a longer window. If your procedure gets delayed beyond that period, you may need to file a new request. Check with your insurer about the expiration policy on your specific predetermination.
How It Helps You Plan Financially
The real value of a predetermination is that it forces your insurer to put numbers on paper before you commit to treatment. The response you receive will typically show the total estimated cost of the procedure, the portion your insurance expects to cover, and your estimated out-of-pocket responsibility. That out-of-pocket figure factors in where you stand with your annual deductible, your coinsurance percentage, and any plan maximums that might cap your benefits.
For dental work, this is especially useful because many plans have annual benefit maximums (often $1,000 to $2,000). If you’ve already used a chunk of your annual benefit on cleanings and fillings, a predetermination for a crown will show you exactly how much of that cap remains and what you’ll need to pay yourself. Without it, you’re guessing.
If the predetermination comes back with higher out-of-pocket costs than you expected, you have options. You can discuss alternative treatment plans with your provider that might be covered at a higher percentage. You can ask your provider’s office about payment plans. Or you can time the procedure strategically, splitting treatment across two benefit years to maximize your annual coverage.
What Happens if It’s Denied
A predetermination can come back showing that your insurer won’t cover a proposed treatment at all. Common reasons include the insurer determining the treatment isn’t medically necessary under their guidelines, the provider being out of network, or the specific procedure not being covered under your plan.
A denial at the predetermination stage is actually better than a denial after you’ve already had the work done and owe the full bill. If your predetermination is denied, you can appeal the decision. You can also ask your provider to submit additional documentation supporting why the treatment is necessary, or request a peer-to-peer review where your provider speaks directly with the insurer’s clinical reviewer. If the denial stands, you’ll at least know the full cost before deciding whether to proceed.
How to Request One
In most cases, your provider handles the predetermination process for you. Your dentist or doctor’s billing staff will prepare the submission, attach the necessary clinical documentation, and send it to your insurance company electronically or by mail. Your main role is to ask for it. Before scheduling an expensive procedure, simply tell your provider’s office that you’d like a predetermination submitted to your insurance first.
Once the response comes back, your provider’s office should share the results with you. Review the estimate carefully. Confirm that the procedure codes listed match what your provider actually plans to do. Check that the benefit calculation looks right based on what you know about your plan’s deductible and coinsurance. If something looks off, call your insurer’s member services line and ask them to walk through the numbers with you.