How to Read a Dental Estimate for a Root Canal

• An estimate (treatment plan) is your dental office's projection of the fees for the recommended work.
• A predetermination of benefits is when the office sends that plan to your insurer *before* treatment, and the insurer responds with what it expects to cover. It is not a guarantee, but it removes most of the guesswork.

For a bigger procedure like a root canal plus a crown, asking for a predetermination is often worthwhile — it tells you the likely out-of-pocket figure before you commit. For public coverage, see the separate rules in does the CDCP cover a root canal.

Most estimates share the same building blocks:

Procedure codes

Canadian dental plans use standardised procedure codes (from the dental association's system) to describe each treatment. Each line on your estimate has a code, a description, and a fee. For a root canal you might see separate codes for the root canal itself (often varying by tooth type/number of canals), for X-rays, and for any build-up or crown.

The fee

The amount the office is charging for each coded item. This may be based on the provincial suggested fee guide, but offices can set their own fees, so this is the "before insurance" number.

Eligible amount / plan allowance

What your insurer recognises for that code. If it differs from the office's fee, the gap may be yours to pay.

Coverage percentage

Plans pay different percentages for different categories. Many classify root canals as "basic" or "endodontic" services (sometimes covered at a higher percentage) and crowns as "major" services (often covered at a lower percentage) — a distinction explained in does insurance cover a root canal.

Your estimated portion

The bottom line: what you are expected to pay after the plan's share. This is the number most people care about, but it is only as reliable as the assumptions above.

The following shows the *shape* of an estimate, not real fees or codes:

Notice how the crown often sits in a different coverage category from the root canal — this is a common surprise, and a good reason to look at the whole plan, not just the root canal line.

• Annual maximum — the most your plan pays in a benefit year. A root canal plus crown can use a large chunk of it; timing treatment across two benefit years is sometimes discussed to manage this.
• Deductible — an amount you pay before coverage kicks in.
• Frequency/limitations — some services are limited (e.g., how often certain X-rays are covered).
• Assignment of benefits — whether the plan pays the office directly or reimburses you.
• Least expensive alternative treatment (LEAT) clauses — some plans base payment on a cheaper alternative, leaving you the difference.

• Ask for a predetermination for a root canal and crown, so surprises are minimised.
• Check the crown separately — confirm its category and percentage, since it is often covered differently.
• Watch your annual maximum — ask whether splitting treatment across benefit years helps.
• Confirm who gets paid — you or the office.
• Keep a copy — you will want it for your records and any follow-up.

Reading the estimate is really about matching each coded item to what your plan will do with it. Once you can do that, the final number is no longer a mystery.

To make the pieces click together, here is how a typical estimate flows in principle (using no real fees — just the logic):

1. 1The office fee for each coded item is listed — say, the root canal, the X-rays, and later the crown.
2. 2Your plan's eligible amount for each code is applied; if the office fee is higher, note the gap.
3. 3The coverage percentage for that category is applied to the eligible amount — often a higher percentage for the root canal (basic) and a lower one for the crown (major).
4. 4Your deductible (if any) is accounted for.
5. 5The plan's payment comes out, and your portion is the remainder plus any gap between office and plan fees.

Seeing it as a flow — fee, eligible amount, percentage, deductible, your share — makes it much easier to spot *why* your out-of-pocket figure is what it is, and where a crown in a lower category changes the maths.

One practical lever the paperwork reveals is timing. Because most plans reset their annual maximum each benefit year, a root canal and crown that together approach your yearly cap might be more affordable if the two stages fall in different benefit years — for example, the root canal now and the crown early in the new year, if that is clinically acceptable. This is not always possible or advisable (an unprotected back tooth should not wait too long for its crown — see delaying the crown after a root canal), but it is worth asking your dentist whether the timing can be arranged to make the most of your coverage. Your estimate and remaining annual maximum are the numbers that tell you whether it is worth doing.

Is a predetermination a guarantee of payment?

No. It is the insurer's expectation based on the information provided; the actual payout can differ if circumstances change. It is still far better than guessing.

Why is the crown covered less than the root canal?

Many plans put endodontic treatment in a "basic" category and crowns in a "major" category with a lower percentage. Always check both lines.

What if the office fee is higher than my plan's allowance?

The difference may be your responsibility. Ask the office to explain any gap between their fee and the plan's eligible amount.

Can the office submit this for me?

Usually yes. Most offices can send a predetermination to your insurer and help you interpret the response.

If you would like your root canal (and any crown) laid out as a clear estimate — and, where possible, a predetermination sent to your insurer — our team can help. Learn about root canal treatment in Markham or book an assessment to get the paperwork started.