Sun Life Canada Insurance Claim Denied? How to Appeal

Sun Life Financial is one of Canada's largest insurance companies, offering life insurance, health insurance, disability insurance, critical illness insurance, and group benefits to millions of Canadians. With such a large portfolio, Sun Life also handles — and denies — a significant number of claims each year.

If Sun Life has denied your claim, this guide explains why it may have happened and how to challenge the decision effectively.

Common Reasons Sun Life Denies Claims

Group Benefits and Extended Health (EHC)

Sun Life is Canada's largest group benefits insurer, managing employer-sponsored plans for thousands of Canadian workplaces. Common group EHC denial reasons include:

Drug not on formulary. Sun Life maintains a formulary for group plans. If your prescription is not listed or requires prior authorisation, the claim will be denied or reduced. Specialty biologics (e.g., Humira, Stelara, Dupixent) routinely require prior authorisation with clinical justification.

Annual limit reached. Paramedical services (physiotherapy, psychology, massage therapy, chiropractic) are subject to annual limits. Once the limit is reached, Sun Life denies further claims for that calendar year.

Provider not eligible. Sun Life requires that treating providers be appropriately registered. If your provider does not hold the required designation, the claim will be refused.

Coordination of benefits dispute. If you have dual coverage (two employer plans), Sun Life may deny or reduce a claim based on the coordination of benefits rules.

ltd-and-individual">Disability Insurance (Group LTD and Individual)

Sun Life is a major provider of both group long-term disability (LTD) and individual disability insurance. Common denial grounds:

Definition of disability not met. Sun Life group LTD policies typically use an "own occupation" definition for the first two years, transitioning to "any occupation" thereafter. Denials often occur at the 2-year transition point, when Sun Life determines the claimant can perform some form of work.

Medical evidence insufficient. Sun Life requires ongoing medical evidence of total disability. If your physician's documentation is vague or inconsistent, Sun Life may use this to deny or terminate benefits.

Failure to participate in rehabilitation. Sun Life group LTD policies typically include a rehabilitation clause. Refusal without reasonable cause to participate in a return-to-work programme may result in benefit termination.

Pre-existing condition exclusion. Individual and some group policies exclude disabilities arising from conditions for which the insured received treatment within a specified period before coverage began (typically 3 to 12 months).

Critical Illness

Sun Life CI denials typically involve condition definition disputes (particularly for early-stage cancer, TIAs, and cardiac events) and non-disclosure allegations.

Life Insurance

Sun Life life insurance denials involve non-disclosure, contestability period disputes, policy lapse, or exclusion clause applications (e.g., suicide exclusion within two years).

Sun Life's Internal Appeal Process

Sun Life has a structured internal complaint and appeal process:

Step 1: Request the Denial in Writing

If you received a verbal denial, request written confirmation with the specific policy provisions and reasons.

Step 2: Gather Your Evidence

Depending on the type of denial:

• Health/drug: Physician letter explaining medical necessity and formulary exception justification
• Disability: Comprehensive physician and specialist reports documenting functional limitations; functional capacity evaluation (FCE) if appropriate
• Critical illness: Specialist letter confirming the clinical basis for diagnosis and how it meets the policy definition

Step 3: Submit an Internal Appeal to Sun Life

Write formally to Sun Life's appeals or client relations department. Mark your letter as a formal appeal. Include:

• Policy/contract number and claim reference
• A clear statement of why the denial is incorrect
• All supporting medical documentation
• Reference to the specific policy language you believe applies

Sun Life typically acknowledges appeals within 10 business days and issues a response within 60 days for group claims.

Step 4: Escalate to the OLHI (Individual Policies)

If your Sun Life appeal is unsuccessful and you hold an individual (non-group) policy, escalate to the OmbudService for Life & Health Insurance (OLHI) at olhi.ca or 1-888-295-8112.

For group plan disputes, the applicable body is the Group Insurance OmbudService or provincial regulator.

Step 5: Provincial Regulator

File a complaint with FSRA (Ontario), AMF (Quebec), BCFSA (BC), or another provincial regulator for market conduct concerns.

Step 6: Legal Action

For significant denied disability or life insurance claims, litigation may be necessary. Sun Life has well-resourced legal teams — professional legal advice from an insurance litigation specialist is highly recommended before proceeding.

The Two-Year Contestability Period

For individual life and CI policies, Canadian insurers — including Sun Life — have two years from policy inception to contest a claim on the basis of misrepresentation or non-disclosure. After two years, Sun Life generally cannot void the policy for innocent non-disclosure.

If Sun Life denies a claim within the contestability period, the burden is on them to show the misrepresentation was material.

Fight Back With ClaimBack

ClaimBack helps Canadians challenge Sun Life claim denials with professional appeal letters, medical evidence frameworks, and OLHI complaint preparation — whether your claim involves group EHC, individual disability, critical illness, or life insurance.

Start your Sun Life appeal with ClaimBack

Related Reading

• How to Write an Insurance Appeal Letter
• What Is Medical Necessity in Insurance?
• Internal vs External Insurance Appeal: What's the Difference?