UK Private Medical Insurance Claim Denied? Your Complete Appeal Guide

Private medical insurance (PMI) gives you access to faster diagnosis, specialist treatment, and private hospital care — but only if your insurer pays your claims. When a PMI claim is denied, you may be forced to join NHS waiting lists for care you believed was covered, or face significant out-of-pocket costs.

The good news: UK PMI policyholders have strong rights under FCA regulation, and a substantial proportion of denied claims can be successfully challenged.

What Is Private Medical Insurance?

PMI covers the cost of private medical treatment for acute conditions — illnesses or injuries that can be treated and resolved. PMI typically covers:

• In-patient and day-patient hospital treatment
• Specialist consultations and diagnostic tests
• Surgery and associated anaesthetics
• Mental health treatment (on plans that include it)
• Cancer care (on comprehensive plans)

PMI does not typically cover chronic conditions (long-term management), pre-existing conditions (depending on the policy type), GP appointments, or routine dental and optical care.

Most Common Reasons for UK PMI Denial

Medical Necessity

Insurers apply their own clinical definitions of "medically necessary." This means your specialist may recommend a treatment that the insurer refuses to fund, arguing it is not clinically necessary, is experimental, or that a less expensive alternative is available.

Pre-existing Condition Exclusions

There are two main types of UK PMI underwriting:

• Moratorium: Conditions you had symptoms of in the five years before joining are excluded for the first two years of cover. After two continuous symptom-free years, the condition may become covered.
• Full Medical Underwriting (FMU): You declare your medical history at application and receive a personalised list of exclusions at inception.

Both types generate significant disputes about what qualifies as a pre-existing condition and whether the exclusion applies.

Pre-authorisation Failure

Most PMI policies require pre-authorisation before receiving non-emergency in-patient treatment or seeing certain specialists. If you proceed without this step, your claim will almost certainly be denied — even if the treatment would otherwise be covered.

Out-of-Network Treatment

PMI plans restrict care to approved hospital and consultant lists. Treatment outside the network without prior approval is not covered under most plans.

Annual Limits Exceeded

Many plans have monetary limits for specific treatments (e.g., physiotherapy sessions, mental health treatment, cancer care). Once the limit is reached, further claims in the same policy year are refused.

Your FCA Rights as a PMI Policyholder

Every FCA-regulated PMI insurer must:

• Provide an Insurance Product Information Document (IPID) at inception
• Handle complaints under the FCA DISP rules
• Acknowledge complaints within five business days
• Issue a final response within eight weeks
• Inform you of your right to refer disputes to the Financial Ombudsman Service (FOS)

The IPID contains a plain-English summary of what your policy covers, what is excluded, and your key rights. It is a crucial document for any appeal.

How to Appeal a PMI Denial

1. Get the Denial in Writing

Request written confirmation of the denial, specifying the policy clause and clinical reasoning relied upon.

2. Review Your Policy Documents

Read your policy wording carefully. Focus on:

• The definition of "medically necessary"
• The exclusions schedule
• Pre-authorisation requirements
• Your plan's hospital and consultant list

3. Lodge a Formal Complaint

Write a formal complaint to your insurer's complaints team. Include:

• Your policy number and claim reference
• A clear explanation of why the denial is incorrect
• Supporting medical evidence: GP letter, consultant report, diagnostic results
• Clinical guidelines (NICE) supporting the treatment's necessity

4. Refer to the Financial Ombudsman Service

If unsatisfied after the insurer's final response, refer to the FOS within six months. The FOS handles thousands of PMI disputes annually and frequently overturns denials where:

• Policy terms are ambiguous and interpreted against the insurer
• Clinical evidence clearly supports the treatment
• The pre-authorisation process was unclear or the insurer's instructions were misleading

Choosing the Right PMI Insurer Going Forward

If you are in an appeal now, consider reviewing your policy at renewal. The main UK PMI providers — Bupa, AXA Health, Vitality, Aviva, Cigna, and WPA — differ significantly in how they handle claims and appeals. The FOS publishes annual complaint data by insurer, which can inform your choice.

Fight Back With ClaimBack

ClaimBack specialises in UK PMI appeal letters and FOS complaint submissions. Whether your claim was denied by Bupa, AXA, Vitality, Aviva, or any other FCA-regulated insurer, ClaimBack helps you build a professional, evidence-based challenge.

Start your PMI 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?