What is a dental insurance predetermination?
A predetermination is a voluntary request to your dental insurance company to review and estimate coverage for planned dental work before you proceed. It's not a guarantee of payment, but it helps you understand what your plan will likely cover.
Medically reviewed by Dr. Jose, DDS — September 7, 2026
What is a predetermination?
A predetermination (sometimes called a “preauth” or “treatment estimate”) is a request your dentist’s office can submit to your insurance company before you start major dental work. The insurer reviews the proposed treatment plan and tells you and your dentist what they expect to cover and what you’ll likely owe out of pocket.
Think of it as a sneak preview of your insurance company’s decision—not a binding contract, but an educated guess based on your plan’s terms.
Why your dentist might request one
Your dental team usually submits a predetermination for significant treatment, such as:
- Crowns or bridges
- Root canals
- Implants or complex restorations
- Periodontal (gum) procedures
- Extensive fillings or extractions
For routine care like cleanings, exams, and simple fillings, most offices skip this step because the coverage is straightforward.
What the predetermination shows you
Once your insurance company responds, you’ll typically see:
- The treatment code(s) — the standardized procedure codes your dentist is planning
- What your plan covers — the percentage (like 50% for major work) or dollar amount
- Your estimated out-of-pocket cost — what you’ll pay after insurance
- Any deductible or maximum — how much you’ve used of your annual benefit
- Coverage limits — whether the insurer will cover all of the proposed work
It’s not a guarantee
This is crucial: a predetermination is an estimate, not a promise. Your actual coverage could differ if:
- Your plan changes between the predetermination date and your appointment
- Your dentist discovers additional problems during treatment and needs to adjust the plan
- The procedure codes change when the actual claim is filed
- You hit your annual insurance maximum partway through treatment
If your final bill doesn’t match the predetermination, ask your dentist’s billing team and your insurance company to explain why.
How to request a predetermination
You don’t request one yourself—your dentist’s office does. When you’re being evaluated for major work, ask if they can submit a predetermination. Provide your insurance information, and the office will send the treatment plan to your insurer. The turnaround is typically 5–10 business days, though it varies by insurance company.
Related guides to explore
Understanding predeterminations is part of managing your dental benefits. You might also want to read about what dental insurance typically covers and what to do if your dental claim is denied.
Questions to ask your dentist
Before your predetermination is submitted, clarify:
- “Will this predetermination cover all the work you think I need, or just the immediate phase?”
- “How long is this predetermination valid?” (Usually 30–90 days, then it expires.)
- “If the insurance estimate doesn’t cover everything, what are my options?”
- “Can you explain the treatment codes you’re using so I can follow along with the insurance response?”
How MediMouth helps
MediMouth member dentists are experienced in working with insurance, including preparing predeterminations. When you’re ready for major treatment, your MediMouth dentist can submit the request on your behalf and help you understand the response. If your predetermination raises questions or if you’d like a second opinion on a treatment plan before costs mount, MediMouth dentists are ready to review your case and discuss your options. Visit our find a dentist page to connect with a provider near you.
Frequently asked questions
Is a predetermination the same as an insurance guarantee?
No. A predetermination is an estimate of what your insurance company expects to cover based on your plan and the treatment plan your dentist submits. It is not a guarantee of payment. Your actual coverage may differ if your plan changes, if treatment details change, or if your dentist submits a different claim code than predicted.
Do I have to request a predetermination?
Predeterminations are voluntary. Your dentist's office can submit one if you ask, especially for major procedures like crowns, implants, or extensive restorative work. Routine cleanings and exams typically don't require one.
What should I do if my predetermination estimate doesn't match my final bill?
Contact your dentist's billing team and your insurance company to clarify the difference. Ask for an itemized explanation of charges and coverage. If you believe there's an error, you can file an appeal with your insurer — your dentist's office can often help with this process.