Preauthorization under the CDCP: which care needs it, and how to anticipate it

You have your card, your coverage is active, and you assume every treatment will follow on its own. Then the dentist sets down the pen and drops the line that plants doubt: a request has to be sent to Sun Life first. Welcome to the world of preauthorization under the CDCP, that administrative filter many discover at the worst moment, with a crown or a denture in view. The official list of services covered by the plan says it clearly: some procedures are covered, but only after a green light obtained before treatment begins. Knowing which ones, and how the request works, keeps you from believing a treatment is secured when it is not yet.

Which care requires preauthorization

The general rule is reassuring. The vast majority of routine care, exams, cleanings, X-rays, fillings, root canals on the usual teeth, requires no step. The green light is implicit. It is for heavier, costlier, or more complex procedures that the plan requires an upfront check. The Dental Benefits Guide, in force since April 1, 2026, sets this boundary procedure by procedure. Here are the main cases where approval becomes mandatory. In practice, a crown requires approval from age eighteen, on an X-ray and periodontal file, up to a limit of four crowns over ten years. Partial or complete dentures go through an assessment on a clinical file. The same applies to canal retreatment, to a root canal on a third molar when its role in the bite is demonstrated, to oral surgery, to sedation, and to additional scaling units justified by a periodontal need. In each case, the approval carries its own validity period, most often tied to your file.

Not all teeth are equal in the plan's eyes either. A crown or a root canal is only considered on incisors, canines, premolars, and the first two molars. The third molar qualifies for nothing, except in the rare case where it alone ensures the bite. A technical detail, but one that changes everything when it is precisely that tooth causing the pain.

The logic behind this sorting is quickly understood. The more a procedure commits funds or clinical time, the more the plan wants to make sure it meets a real need before committing. A filling costs little and repeats, an exam too, hence the absence of a check. A crown, a denture, or sedation represent amounts of another order, and a single ill-founded decision weighs heavily on public accounts. Preauthorization is therefore not a whim; it is the safeguard that lets the plan keep its promises on essential care while keeping control of its spending. Understanding it this way helps you approach it without irritation.

How an authorization request unfolds

The process always starts at the clinic, never with the patient. Your dentist builds a file and sends it to Sun Life, backed by X-rays and a periodontal chart. Preauthorization is nothing like a rubber stamp on an assembly line. Requests are weighed on strict clinical criteria, and not all pass. A crown placed for a purely cosmetic reason, for example, has no chance where a severely broken-down tooth will be considered.

Expect a delay. The answer does not come within the minute, since an assessor genuinely reviews the file. Once approval is given, it carries an expiry date. Most authorizations are valid for twelve months, some for twenty-four. This point is worth pausing on: there is no use getting a crown approved a year before placing it if you let it drag. Past the date, everything must be redone. The right reflex, as soon as the approval arrives, is to schedule the treatment without delay rather than putting it off indefinitely.

This step also explains why the estimate takes on its full meaning. Before launching a request, your dentist can submit an estimate to Sun Life, which states the amount recognized for the procedure and the share that will remain your responsibility. You see, in black and white, what the authorization actually covers, and what it does not. Because an approved crown is still reimbursed at the plan's rate, not the clinic's rate. If yours bills above that amount, the gap comes back to you, authorization or not. Confusing clinical approval with full coverage is the most frequent mistake, and the most costly.

An approval is never a guarantee of payment

Here is the trap few patients anticipate. An authorization obtained today can be refused for reimbursement tomorrow if your situation has changed in the meantime. The plan checks your eligibility at the time of care, not only at the time of the request. A change in income, private coverage regained, and the crown approved in January is no longer paid in June. The approval confirms that the procedure is clinically eligible; it does not freeze your coverage.

This nuance matters all the more for dentures, often long to plan. If you are considering this solution, it is worth knowing in advance how a major treatment is prepared under the plan rather than discovering it along the way. Always ask the clinic to confirm your active coverage just before treatment, even when the authorization is in hand. It is the only way to avoid the surprise bill, the one that arrives when you thought everything was settled.

Refusal, reconsideration, and the safety door

A refusal is not always the end. The CDCP provides a reconsideration procedure, which the patient or their dentist can start by bringing additional clinical evidence. A clearer X-ray, an updated periodontal chart, a better-supported argument sometimes tip a decision. It takes patience and a careful file, but the path exists. A refusal is not a judgment on you; it is often the sign that a piece was missing from the file.

You still have to understand why the request was rejected. The reason appears in the answer, and it guides what comes next. A frequency criterion already reached cannot be contested, whereas a clinical justification deemed insufficient can be completed. Your dentist remains your best ally in this step, because it is they who translate your situation into language Sun Life recognizes. Do not hesitate to ask them to rework the file rather than giving up at the first no.

There remains the emergency case. When care cannot wait for the authorization delay, the plan opens a safety door called post-determination. Coverage is then assessed after the care rather than before. Be careful, this exception stays the exception, never the routine, and it applies only to genuinely urgent clinical situations. To my mind, it is better never to count on it and to treat every preauthorization as a step to anticipate, not to bypass. One last reminder that carries weight: dental implants require no authorization, because they are purely and simply excluded from the plan and cannot be the subject of any reconsideration.

Preauthorization: anticipate rather than endure

Boiled down to the essentials, preauthorization is not an arbitrary obstacle; it is a clinical triage. The plan reserves its funds for the treatments it judges necessary, on evidence, and sets aside comfort or aesthetics. For you, the best attitude comes down to three moves: always ask whether your care requires approval, have your coverage confirmed before treatment, and do not let an obtained approval sit idle. The plan rewards those who anticipate, not those who discover the rules at the counter. An informed patient, who asks the right questions before every heavy procedure, turns an administrative constraint into a simple, controlled formality, and pays what they planned, no more, no less.

Frequently asked questions

How long does a preauthorization request take?

The delay depends on Sun Life, which genuinely reviews each file with its X-rays and supporting documents. It is never immediate. Plan your request ahead and avoid scheduling the treatment before you have received the written answer.

Is an approved crown always reimbursed?

No. The approval confirms the clinical eligibility of the procedure, but your coverage is checked at the time of care. If your eligibility changes by then, the crown can be refused for reimbursement despite the authorization obtained.

What should I do if my request is refused?

The plan provides a reconsideration, started by you or your dentist, backed by new clinical evidence. A better-documented file sometimes changes the decision, but nothing is guaranteed.

Do implants go through authorization?

No. Implants and everything related to them are excluded from the plan. They are never covered and cannot be the subject of an authorization or a reconsideration.