Why You Got a Bill Even Though You Have Dental Insurance
You have coverage. You went in for a crown. A bill arrived anyway.
This is the single most common insurance question we get. Once you know the handful of reasons behind it, most of dental insurance stops being mysterious.
A dental plan almost never pays everything. Preventive care is typically reimbursed at 80–100%, basic work at 70–80%, and major work like crowns and dentures at around 50% — all capped by an annual maximum that usually resets on January 1. A bill after treatment nearly always means one of those limits applied.
There are really only five explanations:
- The service was covered at less than 100%.
- You’d already used up your annual maximum.
- You hadn’t met your deductible yet.
- A downgrade clause paid for a cheaper alternative than what you received.
- The clinic’s fee was higher than the amount your insurer bases reimbursement on.
What are the three coverage categories?
Almost every dental plan sorts procedures into buckets and pays a different percentage for each.
| Category | What’s in it | Typical reimbursement |
|---|---|---|
| Preventive / diagnostic | Exams, cleanings, x-rays, fluoride | 80–100% |
| Basic / restorative | Fillings, simple extractions, root canals, gum treatment | 70–80% |
| Major | Crowns, bridges, dentures | around 50%, sometimes not covered |
The pattern is deliberate. Insurers cover prevention generously because catching a problem early avoids the larger procedure that follows. The bigger the procedure, the smaller the share the plan carries.
Orthodontics usually sits outside this structure entirely, in its own category with its own rules and a separate lifetime cap.
The practical consequence: a filling and a crown are not covered the same way, even though both repair the same tooth. If your dentist recommends a crown, expect a different number than you’re used to seeing for routine work.
What is an annual maximum, and when does it reset?
Your annual maximum is the total your plan will pay in a benefit year — commonly between $1,000 and $2,500. Once you hit it, everything after that is yours until the year resets.
Two things follow from that.
Most plans reset January 1. Unused benefits don’t carry over. If it’s November, you have room left, and you’ve been putting off work your dentist has already recommended, completing it before December 31 uses coverage you’d otherwise lose.
Major work uses a maximum quickly. A root canal and the crown that follows it can use most of a year’s maximum on one tooth. Where it’s clinically safe to stage treatment — and that’s the first question, not an afterthought — a larger plan can sometimes be sequenced across a year-end so it draws on two benefit years instead of one. Whether that’s appropriate depends entirely on the tooth, so raise it as a question rather than assuming it applies.
What are deductibles, frequency limits, and downgrade clauses?
Three more pieces of fine print shape what you actually pay.
| Term | What it means | What it costs you |
|---|---|---|
| Deductible | An amount you pay before coverage starts each year | Often $25–$50. Applied per person, per family, or only to basic and major services, depending on the plan |
| Frequency limit | A cap on how often a service is covered — cleanings every nine months rather than six, a crown replaceable only once in several years | The full amount, if you exceed it. The procedure is covered; your timing wasn’t |
| Lifetime maximum | A one-time cap, most commonly on orthodontics | Everything past the cap, permanently, on that plan |
| Downgrade clause | The plan reimburses what a cheaper alternative would have cost — the amalgam rate for a white filling, for instance | The difference between the two. Not a denial or an error; it’s written into the plan |
How does the BC fee guide affect your reimbursement?
The British Columbia Dental Association publishes a suggested fee guide each year, covering more than 1,400 procedure codes, updated each February.
Two things about it matter to you as a patient.
First, dentists are not required to follow it. The BCDA is explicit that its fees are suggestions, and every practice sets its own.
Second, many insurers calculate reimbursement against that guide — sometimes against a previous year’s version. If a clinic’s fee sits above the figure your insurer uses, the plan pays its percentage of the lower number and the remainder is yours. This is normal, it’s usually small, and any clinic should be able to explain it to you before treatment rather than after.
One important exception: the Canada Dental Care Plan is federal, and its fee schedule sits meaningfully below the BCDA guide. For CDCP patients that difference is larger than the gap a private plan typically leaves, and it applies on top of the income-based co-payment. If the CDCP is your only coverage, ask for both figures in writing before treatment starts.
What is direct billing?
Direct billing, sometimes called assignment of benefits, means the clinic submits your claim electronically to your insurer at the time of your appointment. The insurer pays its portion directly to the clinic and you settle only the balance.
The alternative is paying the full amount at the desk and waiting weeks for a reimbursement cheque. For a cleaning that’s an annoyance. For major work it’s a real cash-flow problem, and it’s the reason some people delay treatment they’ve already decided to have.
Mellow Family Dental Care direct-bills all insurance companies, so most patients leave having paid only their own share.
What is a predetermination, and should you ask for one?
For anything substantial, ask your dentist to submit a predetermination — also called a pre-estimate.
The clinic sends the proposed treatment to your insurer, and the insurer responds with exactly what it will pay. You get that in writing before any work starts. No estimate, no guessing, no surprise.
It takes a couple of weeks, which is why people skip it. For a crown, a bridge, a denture, or a full treatment plan, those two weeks are worth it. We’re happy to submit one for any patient who wants it.
How do you get more out of the plan you already have?
- Use your preventive coverage fully. It’s the most generously covered category and the one people leave on the table. Two cleanings a year at 80–100% is the most generously covered thing in your plan and the easiest to under-use.
- Know your reset date. Most are January 1, but not all. Check.
- Ask for a predetermination on major work. Always.
- Ask whether a large plan can be staged across a year-end, if delaying part of it is clinically safe.
- Keep your numbers somewhere findable — coverage percentages, annual maximum, deductible, reset date. It takes one phone call to your insurer and saves a dozen questions later.
Common questions
What’s the difference between basic and major coverage? Basic services like fillings and root canals are usually reimbursed at 70–80%. Major services like crowns, bridges, and dentures are typically around 50%, and some plans exclude certain major services entirely.
When does my annual maximum reset? Most plans reset January 1, but some follow a different benefit year tied to your employer’s policy date. Confirm yours rather than assuming.
Can I find out my cost before treatment? Yes — ask for a predetermination. Your insurer confirms coverage in writing in advance.
Does unused coverage roll over? Almost never. A small number of plans have a carry-forward feature, but the default is use it or lose it.
My plan denied a cleaning. Why? Most often a frequency limit — you came back sooner than the plan allows. The service is covered; the timing wasn’t.
Related reading
If you’d like someone to look at your plan with you before you commit to treatment, we’re happy to do that; it’s a normal part of a visit here. Call 604.457.2273, or visit us at Unit 150–20528 Lougheed Highway in West Maple Ridge.
Sources: BC Dental Association fee guide · Canada Dental Care Plan coverage
Coverage details vary considerably by plan; percentages and dollar ranges here are typical, not guarantees. Confirm your own coverage with your insurer. This article is general information and does not replace professional advice.
