Insurance Claim Rejection Reasons in Singapore: Common Reasons and How to Check Your Policy Before You Claim

What MAS’s complaint figures actually show

MAS told Parliament on 12 January 2022 that, in the previous three years, about 20% of health-insurance-related complaints made to MAS were due to unsuccessful insurance claims. Within that group, MAS said the majority concerned:

• treatments not covered under the insurance contract;
• claims exceeding claim limits or made after the policy had lapsed; or
• failure to submit supporting documents required to assess the claim.

The MAS release did not give a separate percentage, complaint count or ranking for those three groups. “Majority” should therefore be read collectively, not as three equal shares or a frequency league table.

Separately, MAS said less than 5% of all health-insurance-related complaints received over the same period concerned unsuccessful claims due to non-disclosure. The denominators matter: the three majority groups form part of the complaints about unsuccessful claims, while the non-disclosure figure uses all health-insurance-related complaints as its base.

The 20% figure is also a complaint share, not the percentage of all policies or claims that were rejected. MAS did not say that every complaint ended in a formal rejection or publish enough data to rank the reasons why claims most often fail. The figures identify issues worth checking in a policy; they do not predict the outcome of an individual claim.

When non-disclosure can justify a decline

MAS’s stated test for lawfully rejecting a claim because of non-disclosure has two parts. The insurer must demonstrate that:

• the non-disclosure was material to the underwriting outcome; and
• the applicant could reasonably have been expected to disclose the information when applying for the policy.

MAS also expects insurers to be fair and reasonable, including not rejecting health insurance claims because of undeclared minor and unrelated conditions. That expectation matters where a condition may not have affected the underwriting decision, but it does not remove the need to examine the application questions and the insurer’s stated reasons.

Before disputing a non-disclosure ground, put the proposal form beside the insurer’s decision letter. Ask which question was not answered correctly, what information was withheld, why the non-disclosure was material, and why the applicant was reasonably expected to provide that information. Keep relevant medical records and supporting documents with the response, and ask for the insurer’s conclusion and supporting evidence in writing.

How pre-existing conditions are handled at purchase

The MAS Guidelines on the Online Distribution of Life Policies with No Advice apply to a specific purchasing channel, not every insurance contract in Singapore. Under those guidelines, a policy may be issued on standard terms or on conditional terms. Conditional terms may involve excluding pre-existing conditions or imposing additional premiums.

MAS says the insurer must inform the applicant about conditional terms before purchase and must tell the applicant to declare pre-existing conditions and that additional premiums may result. The online proposal form covered by the guidelines must also require applicants to:

• answer its questions fully and truthfully;
• declare all pre-existing medical conditions;
• disclose existing or applied-for life insurance policies; and
• disclose income.

At the point of purchase, save the proposal form, purchase screens, emails and health declarations. If the offer is conditional, ask the insurer to identify exactly which condition has been excluded or attracts an additional premium, and check that wording against the policy schedule, endorsements and exclusions. The declaration records what was answered; the issued policy records the coverage and restrictions that resulted.

Why a MediShield Life claim may not pay the whole bill

According to MOH’s MediShield Life claim guidance, last updated on 1 June 2026, the maximum claim limit is $200,000 per policy year, with no lifetime limit on claims. The policyholder must pay the applicable deductible first.

MOH describes the co-insurance rate in these bands:

• Within the claim calculation:
• First $5,000: 10%.
• Next $5,000: 5%.
• Amount above $10,000: 3%.

Under MOH’s stated mechanics, a shortfall is therefore predictable even when the treatment is covered: the deductible and co-insurance leave a patient share, while the annual limit sets the maximum claim under MediShield Life. A payment shortfall is not the same thing as a refusal to cover the treatment.

MOH also says the medical institution or private insurer will help submit a MediShield Life claim on the policyholder’s behalf. Do not copy the MediShield Life figures into a private policy check: the MAS complaint release does not provide a universal private-policy deductible, waiting period or exclusion. Use the private policy’s own schedule and wording, and ask the insurer where those documents are unclear.

A pre-claim check against your own policy

Run this checklist before filing. Its purpose is to expose unanswered contract points, not to guarantee acceptance.

1. Assemble the documents that form the contract. Find the policy wording, policy schedule, endorsements, proposal form, purchase declarations, claims instructions and insurer correspondence. Make sure amendments or condition-specific letters are included.

1. Confirm that the policy was in force. Compare the policy dates with the event or service being claimed, then check payment records and lapse notices. If the documents suggest that the policy had lapsed, ask the insurer to identify the precise date and contractual basis it relies on.

1. Trace the treatment through the wording. Locate the benefit that appears to apply, then check its definition, exclusions, conditions and any waiting period. Record the exact wording rather than relying on a label used in a claim form. The MAS complaint release does not provide standard private-policy exclusion wording, so the policy and insurer remain the relevant sources.

1. Test every stated limit. Note whether a limit applies per claim, per policy year, over the policy’s life or to a stated category of treatment. Then identify the exact deductible and co-insurance terms. Keep a limit shortfall separate from a dispute about whether the treatment was covered.

1. Audit the application answers. Compare each health question with the information supplied and the insurer’s explanation. If the decline concerns non-disclosure, check the application against both parts of MAS’s test: materiality to underwriting and reasonable expectation to disclose.

1. Create a document register. Ask the insurer in writing for the exact outstanding documents and the current status of the assessment. MAS identifies failure to submit required supporting documents as a major complaint category, but its complaint release does not set out a universal document list. The GIA Code of Practice also points to claims-management procedures published on GIA’s website.

1. Check timing and submission instructions. Look for any notification, document-submission and claim-notification requirements in the policy and claims instructions. The cited sources do not supply a universal appeal deadline, so do not insert one or treat a free-look period as an appeal period.

1. Keep an audit trail. Retain the complete submission, proof of delivery, itemised claim documents and every exchange with the insurer. Record which points have been confirmed and which remain unresolved before filing.

If the insurer has already declined the claim

Ask for the decision in writing with the exact contractual wording relied upon, the facts used, any claim calculation and the status of every supporting document. If the stated ground is non-disclosure, ask the insurer to address both materiality and reasonable expectation to disclose. If the ground is a limit or missing document, ask for the calculation or precise outstanding list.

Use any internal complaint or appeal process stated in the decision or policy. For the full internal appeal sequence, see the Desk’s companion [appeal guide for a rejected insurance claim in Singapore](/insurance-claim-rejected-appeal-singapore/).

If an allegedly unfair rejection remains unresolved, MAS says a policyholder may seek mediation or adjudication through the Financial Industry Disputes Resolution Centre, or FIDReC. MOH has also established a Clinical Claims Resolution Process for clinical disputes involving Integrated Shield Plan claims. A referral does not assure a particular result.

FAQ

Can MAS’s figures predict whether my claim will be rejected?

No. MAS’s release aggregates health-insurance complaints and describes complaint categories, not the outcome of every claim. It does not publish a frequency ranking or an individual decision rule. The figures show which policy issues warrant attention, not whether a particular claim will succeed.

Is a claim automatically rejected if one supporting document is missing?

The MAS release does not say that every incomplete claim was automatically rejected or upheld. It identifies failure to submit required documents as a major category within unsuccessful-claim complaints. Ask the insurer for the precise outstanding-document list and the claim’s current status.

Does “no lifetime limit” mean MediShield Life will pay every claim in full?

No. MOH still states a maximum claim limit of $200,000 per policy year, alongside the deductible and co-insurance schedule. “No lifetime limit” does not remove the annual limit or the patient share created by those payment mechanics.

Is the 14-day free-look period also an appeal deadline?

No. For online life policies sold without advice, the MAS guideline provides a free-look period of at least 14 days from receipt of the policy document. That is a cancellation right, not an appeal period; a claim dispute follows the rejection process stated by the insurer.

Can MediShield Life figures be used to check a private insurance policy?

No. The MOH figures apply to MediShield Life, while a private policy must be checked against its own wording and schedule. The cited materials do not provide a universal private-policy deductible, waiting period or exclusion, so obtain those details from the policy or ask the insurer.

References

• Monetary Authority of Singapore, Reply to Parliamentary Question on Complaints about Unsuccessful Medical Insurance Claims: https://www.mas.gov.sg/news/parliamentary-replies/2022/reply-to-parliamentary-question-on-complaints-about-unsuccessful-medical-insurance-claims
• Monetary Authority of Singapore, Guidelines on the Online Distribution of Life Policies with No Advice: https://www.mas.gov.sg/-/media/mas/resource/legislation_guidelines/insurance/guidelines/guidelines-on-the-online-distribution-of-life-policies-with-no-advice-id-0117.pdf
• General Insurance Association, The Singapore General Insurance Industry Code of Practice: https://gia.org.sg/images/resources/For-Members/code_of_practice.pdf
• Ministry of Health, How to make a MediShield Life claim: https://www.moh.gov.sg/managing-expenses/schemes-and-subsidies/medishield-life/how-to-make-a-medishield-life-claim/