CDCP problems: refused preauthorization, surprise charges, coverage gaps and how to complain

Most Canadian Dental Care Plan problems fall into five groups: a preauthorization refused or delayed, an unexpected bill from the provider, a provider who does not participate, a coverage gap after missing the renewal deadline, and eligibility questions such as private insurance access shown on a tax slip. Start with your provider, who submits all CDCP claims and preauthorization requests and can see the plan's response. For coverage, claims and member cards, contact the CDCP through the channels listed on Canada.ca; for eligibility and applications, Service Canada and Employment and Social Development Canada handle the file. Keep notes of every call. Care received while your coverage has lapsed is not reimbursed retroactively, so renewing on time is the single most important step.

This guide is part of the dental complaints in Canada overview. Rules are described as of October 2026; check Canada.ca for changes.

Who does what in the CDCP

Problem 1: preauthorization refused

Preauthorization is required for services such as crowns, root canal re-treatment, partial dentures, some sedation and services beyond frequency limits.

What to do:

1. Ask your provider for the reason given.
2. Check whether the service is excluded entirely (for example implants, bridges, bone grafts, veneers) or whether criteria were not met (for example, for crowns: age 18 or over, a restorable tooth, basic treatment completed first, within the crown limits).
3. If criteria may be met, ask your provider whether more information (X-rays, a narrative) can be submitted for reconsideration.
4. If the service is excluded, ask about covered alternatives and their costs; see CDCP covered services.

Problem 2: an unexpected bill

You may be charged for a co-payment (40% or 60% if your adjusted family net income is $70,000 to $89,999), for extra charges where the provider's fee exceeds the CDCP fee, and for services you agreed to that the CDCP does not cover.

Worked example (illustrative): you are in the 0% tier and received an exam and two fillings. CDCP fees total $420; the provider's fees total $490. You receive a bill for $70. That is an extra charge (provider fee minus CDCP fee), not a co-payment. If you were not told before treatment, raise it with the office: ask for an itemised statement and why you were not informed. The Dental Benefits Guide encourages providers to avoid charging CDCP clients for costs the CDCP covers, and for some services asks them to discuss charges in advance. See CDCP co-payments and extra charges and run the numbers in the cost-share calculator.

If you believe a provider billed you for something the CDCP paid in full, you can raise it with the CDCP through its contact channels; for professional conduct issues, with the provincial regulator.

Problem 3: your dentist does not accept the CDCP

Participation is voluntary. Options:

• Ask whether the office will submit claims on a claim-by-claim basis.
• Use the provider search tools linked from Canada.ca to find participating dentists, denturists or hygienists near you.
• Ask your public health unit or community health centre about low-cost clinics.

Problem 4: a coverage gap

CDCP coverage runs to 30 June each year. Members renew each spring (in 2026 renewal closed on 1 June; Canada.ca expects the next renewals to open in spring 2027) after filing their tax return and receiving the Notice of Assessment. If you did not renew in time, coverage ends and you must apply again; care received during the gap is not covered or reimbursed retroactively.

To avoid it:

• File your tax return early, and make sure your spouse or common-law partner files too.
• Watch for renewal notices in your mail and online account.
• Book non-urgent major work for after your new coverage is confirmed.

Problem 5: eligibility questions

• Private dental insurance access. Access through an employer, pension, family member, professional or student association, or a plan you buy yourself makes you ineligible. Check box 45 of your T4 and box 015 of your T4A. If a slip shows access in error, ask the employer or pension administrator to correct it.
• Income changes. Your co-payment tier is based on the previous year's adjusted family net income; it can change at renewal.
• Change in circumstances. If you gain access to dental insurance, update your information as instructed by the CDCP; continuing to use the CDCP when ineligible could lead to repayment.

How to complain or give feedback

1. Provider first for billing and treatment questions.
2. CDCP contact channels on Canada.ca for coverage, claims and card issues.
3. Service Canada for application, eligibility and renewal decisions; ask how to request a review of a decision.
4. Provincial regulator for professional conduct concerns about the provider.
5. Your Member of Parliament's office can sometimes help follow up on federal program files.

Keep a log: date, time, who you spoke to, reference number and what was said.

FAQ

Can I pay the dentist and send the CDCP a claim myself?

No. CDCP clients cannot submit claims for reimbursement; the provider submits them.

Does the CDCP pay for an implant if my dentist says it is the only option?

No. Implants and all implant-related procedures are excluded, regardless of clinical reasons.

Can I use OLHI for a CDCP problem?

OLHI deals with private life and health insurance. Use the CDCP's own channels for the government plan.

What if my provincial program and the CDCP both apply?

Ask the provider which to bill first. The CDCP coordinates with government social programs.

Sources

• Canadian Dental Care Plan — coverage, renewal, contact and provider search
• Service Canada — applications and eligibility
• Sun Life CDCP information — the plan administrator's member information
• Canada Revenue Agency — filing your return and Notice of Assessment