Common private health insurance mistakes in Canada and how to avoid them

The most expensive mistakes with supplementary health coverage in Canada are not about picking the wrong insurer. They are gaps (days or months with no coverage between plans, jobs or provinces), missed deadlines (conversion windows, enrolment periods, claim submission limits), incomplete answers on a health questionnaire that let an insurer refuse a claim later, paying twice for coverage you already have, and claims refused because a practitioner, drug or document did not meet the plan's rules. Almost all of them can be avoided with a few checks. This guide lists them with a worked example each and links to the detailed guides.

This is the overview for the claim problems, mistakes and official sources section. Figures are illustrative.

1. Leaving a gap between plans

What happens. You cancel an individual plan on the 1st and the new plan starts on the 15th. A prescription filled on the 10th is not covered by either.

Worked example. A $380 specialty prescription filled during a two-week gap costs $380 instead of $76 (at 80% coverage), so the gap costs $304.

Avoid it. Never cancel until the new plan has accepted you in writing and the start date is confirmed. When leaving a job, find out the exact end date and the conversion deadline.

2. Missing a deadline

Deadline	Typical length	Consequence of missing
Conversion after leaving a group plan	Often 60 or 90 days	Medical questions; possible exclusions
Adding a new spouse or baby to a group plan	Often 31 days	Late-entrant rules, evidence of insurability
Claim submission	Often 12 months after service, or a fixed date after plan year-end	Claim refused
CDCP renewal	Set yearly by the federal government	Coverage lapses
RAMQ registration after losing group coverage in Quebec	Register promptly	Uninsured period; premium may still be owed

Check each deadline in your plan booklet or on the official site.

3. Incomplete answers on a health questionnaire

What happens. An underwritten application asks about treatment in the past five years. You leave out a physiotherapy course or a prescription you no longer take. A later claim triggers a review of your records, and the insurer finds the omission.

Consequence. Under provincial insurance laws, a material misrepresentation or failure to disclose can allow the insurer to refuse claims or void the contract, often within the first two years and longer in cases of fraud. Answer every question fully and keep a copy of your application. See pre-existing condition exclusions.

4. Paying for coverage you already have

A senior pays for private drug coverage that mostly duplicates the provincial seniors' program.
Both spouses pay for family coverage when one plan covers almost everything. See coordination of benefits.
A family buys an individual dental plan and loses access to the Canadian Dental Care Plan, which would have cost them nothing.

Worked example. Dental-only plan premium $1,080 a year for a family that would have qualified for CDCP at the 0% co-payment tier: they pay $1,080 in premiums plus their coinsurance share instead of little or nothing.

5. Claims refused on a technicality

Common causes:

Practitioner not recognized. Plans usually pay only licensed or registered practitioners; some require a membership in a specific professional association.
No physician referral where the plan requires one, for example for massage therapy or orthotics.
Brand drug without medical justification when the plan pays generic prices.
Prior authorization not obtained for certain drugs.
Receipts missing details such as practitioner registration number, date of service or patient name.
Submitted too late.

What to do if it happens: denied claims and complaints.

6. Assuming coverage follows you

Newcomers may wait up to about three months for provincial coverage in some provinces; see newcomer waiting periods.
Moving provinces triggers a new registration and, in some cases, a waiting period of up to three months while your old province continues coverage; see moving between provinces.
Travelling outside Canada: provincial plans pay little of a foreign hospital bill, and many individual health plans exclude it.

7. Not keeping records for tax

Unreimbursed costs and premiums count toward the medical expense tax credit. Households often miss group premium deductions and pharmacy coinsurance because receipts were thrown away.

A five-minute self-check

Do I know the exact start and end dates of every plan in my household?
Do I know the deadlines for adding dependants and converting coverage?
Did I answer every application question fully, and do I have a copy?
Am I paying for anything a public program or a spouse's plan already covers?
Do I keep receipts and statements in one place?

Use the plan choice checklist for a fuller review, and the official sources guide to confirm rules.

Frequently asked questions

Can an insurer cancel my individual plan because I claimed a lot?

Most individual health plans are guaranteed renewable, meaning the insurer cannot cancel you for claiming, though premiums for the whole plan can rise. Misrepresentation or non-payment are different matters.

What if I find an error in my application after the plan starts?

Tell the insurer in writing as soon as possible. Correcting it yourself is far better than having it discovered at claim time.

Is it a mistake to buy a plan with low maximums?

Not necessarily, if you understand that it covers routine costs, not catastrophic ones. It is a mistake if you expect it to cover a costly ongoing medication.

Sources

OmbudService for Life and Health Insurance — free help with unresolved complaints
Canadian Council of Insurance Regulators — fair treatment of customers
Canadian Life and Health Insurance Association — consumer guides
Canadian Dental Care Plan on Canada.ca — eligibility and renewal
Régie de l'assurance maladie du Québec — Quebec registration rules