The last thing you want to deal with is having your claim rejected after paying over $100,000 for the life-saving surgery that you need.
One woman in Singapore faced exactly that. She suffered a brain aneurysm and underwent surgery to treat it. However, when she tried to claim the fees with her insurer, her claim was rejected.
Fortunately, she also had another policy under a different insurer, and the claim with them went through.
The question is, what does it mean for your Critical Illness (CI) policy if you can’t make a claim for such an important procedure?
Situations like this highlight that not all policies are identical, even if they appear similar on the surface. Two plans may both be labelled as Critical Illness Insurance, but the way they define conditions, assess severity, and determine claim eligibility can differ.
Understanding how your Critical Illness coverage works can help prevent surprises during a medical crisis.
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Why claims can differ even for the same condition
Critical Illness policies are defined by the specific wording in each insurer’s contract. This means a claim is assessed not only based on what happened medically, but also on whether the condition meets the exact definition stated in the policy.
A condition may seem serious, urgent, or even life-threatening, but it may still not qualify for a payout if it does not meet the policy’s listed criteria.
These differences can include severity thresholds, clinical requirements, or the type of medical evidence needed. Some policies may require proof of permanent impairment. Others may require specific diagnostic findings or may classify conditions under different categories.
This is especially relevant for neurological conditions. One insurer may consider a condition under a broader neurological definition, while another may distinguish between a stroke, a brain aneurysm, and other vascular events.
As a result, two insurers can reach different outcomes for the same medical situation. This does not always mean one insurer is “wrong” and the other is “right”. It often comes down to how the policy was written, what it covers, and what requirements must be satisfied before a payout is made.
What Critical Illness Insurance is actually designed to cover
Critical Illness insurance provides a lump-sum payout when the insured person is diagnosed with a covered condition.
This payout is not based on the cost of the treatment. It is based on whether the illness or medical event meets the policy definition.
That distinction matters. Someone may undergo a costly procedure, need urgent medical intervention, or experience a serious health scare, but still not qualify for a CI payout if the policy definition is not met.
The lump-sum payout from a CI policy can usually be used flexibly. Policyholders may use it to pay medical bills, replace lost income, support daily expenses, hire caregiving help, or fund recovery needs.
Most CI policies focus on major conditions such as cancer, stroke, and heart attack, alongside a defined list of specified illnesses. Some newer policies also include early-stage or intermediate-stage coverage, which can provide partial payouts before an illness becomes advanced.
This is why it is not enough to simply know that you have “critical illness coverage”. It is important to know what stage of illness is covered, how each condition is defined, and what evidence is required for a successful claim.
Where the gap can happen between surgery and claim payout
Undergoing surgery does not automatically mean a critical illness claim will be approved.
This can feel counterintuitive. If a condition is serious enough to require surgery, many people assume it should qualify as a critical illness claim. However, CI policies are not designed to pay based on whether surgery happened. They pay based on whether the policy definition has been met.
Aneurysms are a good example. A brain aneurysm may require urgent treatment, and surgery may be necessary to prevent rupture or further complications. However, it may not always meet the definition of a stroke or another covered neurological condition.
Some policies require a permanent neurological deficit to be present. Others may require specific diagnostic criteria, a minimum duration of symptoms, or proof of lasting impairment.
If the condition is treated early, or if the patient recovers without meeting those severity thresholds, the claim may fall outside the policy definition.
This creates a gap between the medical treatment received and eligibility for insurance payouts. The patient may have undergone major treatment, but the policy may still regard the condition as not claimable under its CI definitions.
How brain aneurysms may be treated
In the case we mentioned above, the patient underwent surgery for a brain aneurysm. This is where it helps to understand that there is more than one way to treat illnesses, including an aneurysm. The method chosen often depends on its size, location, whether it has ruptured, and the patient’s overall condition.
Broadly, for brain aneurysms, doctors may consider two main procedures: microsurgical clipping and endovascular treatment, such as coiling.
Microsurgical clipping is an open surgery where the neurosurgeon makes an opening in the skull and places a small metal clip at the neck of the aneurysm. This blocks blood from entering the aneurysm and helps prevent bleeding or re-bleeding.
Endovascular coiling is less invasive. Instead of opening the skull, the doctor inserts a thin tube through a blood vessel and guides it to the aneurysm. Tiny coils are then placed inside the aneurysm to slow or block blood flow, helping a clot form and seal it off.
In some cases, other endovascular methods such as stents or flow diverters may also be used, especially for larger or more complex aneurysms.
This is why the insurance angle can be confusing for patients. A procedure may be medically necessary, highly specialised, and expensive, but a Critical Illness claim may still depend on whether the policy definition is met.
For example, if a policy only pays out when there is a stroke with permanent neurological impairment, treating an aneurysm early may not automatically qualify, even if surgery was required. The medical procedure and the insurance definition are not always the same thing.
Dr Vincent Ng is a Neurosurgeon at Mount Elizabeth Hospital, with clinical expertise in cerebrovascular conditions, including brain aneurysms and complex neurovascular surgery.
He is a panel/extended doctor for the following insurers:
- Great Eastern
- HSBC Life
- Prudential
- Singlife
Disclaimer: Panel affiliations are accurate at the time of publication. Please check with your insurer for the most updated panel list and coverage details.
Common conditions in Singapore that involve surgery but may not trigger CI claims
Brain aneurysms are not the only example where this gap can appear.
Heart-related procedures such as angioplasty or stent insertion may not always qualify as a heart attack under some policies. These procedures can be important and even urgent, but a CI claim may depend on whether the policy definition of heart attack is met, including evidence such as cardiac enzyme levels, ECG changes, or heart muscle damage.
Early-stage cancers may also not trigger a full CI payout if the policy does not cover early-stage illnesses. Some older plans may cover only major-stage cancer, while newer plans may provide partial payouts for early or intermediate stages.
Certain neurological conditions or vascular issues may require surgery, but still not meet CI definitions. This includes situations in which intervention is needed but the condition does not result in the level of disability or impairment required under the policy.
This is why policyholders should understand not just the name of the condition, but how that condition is defined in their policy.
The same medical term can carry different meanings in a clinical setting and in an insurance contract.
Does having more than one CI policy make a difference
Holding more than one CI policy can make a difference in some situations.
Different insurers may define conditions differently. If one policy does not recognise a condition as claimable, another policy might. This was exactly why the woman’s case drew attention: the claim outcome differed across two insurers.
Multiple CI policies can also provide greater financial support during recovery. If both policies pay out, the insured person may receive additional funds to cover medical costs, household expenses, income loss, or long-term care needs.
However, holding multiple policies is not automatically the right answer for everyone. It depends on whether you can pay for it, your coverage needs, and whether the policies overlap meaningfully.
The goal is not to duplicate your coverage but to ensure sufficient protection across different scenarios.
For example, someone may choose to combine a traditional major-stage CI policy with an early-stage CI plan. Others may add a multi-pay CI policy that allows claims for different stages of illness or recurrences. The right structure depends on your income, dependants, existing savings, health risks, and budget.
What to review in your own CI policy
1. Review the exact definitions of covered conditions
Especially for major illnesses such as stroke, heart attack, cancer, and neurological disorders
2. Read the detailed policy wording
Clarify terms and conditions that you may not be sure of. Check on the exclusions and conditions that may not be covered. These could include specific disease stages, pre-existing conditions, waiting periods, or medical events that do not meet required thresholds.
3. Check if your policy includes early-stage or partial payouts
A plan that covers only late-stage critical illnesses may not provide support if a condition is detected and treated early. For example, if someone detects cancer at stage 2.
4. Check on the total coverage amount
Is it sufficient for your needs? A payout that seemed sufficient years ago may no longer be adequate if income, family responsibilities, or treatment costs have increased.
5. Check if the policy has been updated to reflect current medical practices and definitions
Medical treatment evolves, and older policies may not always align neatly with newer diagnostic methods or intervention pathways.
Why periodic policy review matters
Medical definitions and treatment methods change over time.
A procedure that was once considered invasive or rare may now be more common. Conditions may also be detected earlier due to better screening and imaging. This can be good for health outcomes, but it may complicate insurance claims if older policies only recognise more severe disease stages.
Older CI policies may have narrower definitions compared to newer ones. They may focus heavily on late-stage disease or require more severe impairment before paying out.
At the same time, life circumstances change. A young working adult may need income protection. A parent may need coverage that protects family finances. Someone approaching retirement may need to reassess whether their CI coverage still matches their current responsibilities.
Reviewing policies regularly ensures that coverage remains relevant and adequate.
Waiting until a claim situation arises is often too late to make adjustments. Once a medical condition appears, it may affect future underwriting, exclusions, or eligibility for new coverage.
Know your coverage, before you need it
Critical Illness Insurance is not just about having a policy. It is about understanding how that policy works.
Claim outcomes depend on definitions, not just diagnosis or treatment. A serious medical event may still fall outside a policy’s wording if the criteria are not met.
Taking time to review your coverage helps reduce uncertainty during a medical event. It helps you understand what is covered, what is excluded, and whether your current plans are sufficient for your needs.
Planning ahead allows individuals and families to focus on recovery rather than financial disputes. Review your coverage using our Coverage Checker
