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Making Insurance Claims After a Diagnosis in New Zealand

Insurance can be one of the most important financial resources after a serious diagnosis — but the process of finding policies, understanding what triggers a claim, and navigating a declined decision is not always clear. This guide walks through each stage. If you'd rather have a plan built around your situation, answer a few questions and we'll build one around you →

Types of policy to check

Several types of insurance can respond to a serious illness diagnosis. Check each category, not just the policies you remember holding:

Finding policies you may have forgotten

It's common to hold cover you've lost track of. Check these sources:

What "trauma" and "critical illness" actually mean

This is where many claims run into difficulty. A trauma or critical illness policy does not simply pay out because you have been diagnosed with a serious illness — it pays when your diagnosis matches the specific clinical definition written into the policy for each listed condition.

For example, most policies define "heart attack" using specific cardiac enzyme or ECG criteria. A diagnosis of a minor cardiac event may not meet the definition even if your doctor uses the same term. Similarly, "cancer" definitions in many policies exclude early-stage, non-invasive, or in-situ conditions.

This does not mean you won't qualify — it means the wording matters. Ask your specialist to provide a diagnosis letter that includes the specific clinical details: the type and staging of the condition, the diagnostic criteria met, and relevant test results. A letter that just states the common name of the condition may not be enough for an insurer to assess your claim.

If you're unsure whether your diagnosis meets the policy definition, an insurance broker or financial adviser can help interpret the wording before you lodge a claim.

How to make a claim

Once you've identified a policy that may respond to your diagnosis:

What insurers can and can't do

Insurers in New Zealand are regulated by the Financial Markets Authority (FMA) and must meet conduct standards under the Financial Markets Conduct Act.

If your claim is declined

A declined claim is not necessarily final. There is a clear process to challenge it:

Step 1 — Internal dispute resolution (IDR). Every insurer must have an IDR process. Write to the insurer formally requesting a review of the decision. Ask for the specific reasons the claim was declined in writing, and respond to each point. This step is mandatory before escalating further.

Step 2 — Insurance and Financial Services Ombudsman (IFSO). If the insurer's IDR process doesn't resolve the dispute, you can take the complaint to IFSO — a free, independent service that reviews disputes between consumers and insurers. Call 0800 888 202 or visit ifso.nz. IFSO can direct an insurer to pay a valid claim. They require you to have gone through the insurer's IDR process first.

If the amount in dispute is large, or the policy wording is genuinely ambiguous, a lawyer experienced in insurance law can advise on your options before or after the IFSO process.

A note on ACC

ACC (the Accident Compensation Corporation) is often mentioned in conversations about illness and injury, so it's worth being clear: ACC covers accidental injury, not illness. A diagnosis of cancer, heart disease, MS, or any other medical condition is not covered by ACC.

There is one exception worth knowing: if a medical procedure causes an accidental injury during treatment — known as a treatment injury — ACC may cover the costs of that specific injury. But the underlying illness itself is not covered.

This distinction matters because New Zealand's no-fault ACC scheme means there is no personal injury litigation culture here. Unlike some other countries, you cannot sue for compensation if an illness affects your ability to work. Your own insurance is the primary financial protection — which is why checking every policy you hold is worth doing thoroughly.

Getting help with policy wording

Insurance policy documents are written in legal and medical language that can be genuinely difficult to interpret. A licensed financial adviser or insurance broker can read the policy against your specific diagnosis and give you a view on whether a claim is likely to succeed before you lodge it.

Many advisers offer a free initial consultation for this kind of review. To find a licensed financial adviser in New Zealand, search the Financial Service Providers Register at fsp-register.companiesoffice.govt.nz — look for someone who holds a licence for life and health insurance advice.

Work through your situation step by step with the diagnosis tool →

This guide provides general information only — not legal, financial, medical, or benefits advice. Eligibility rules and payment amounts change regularly. Verify current details with official sources before making decisions. Information current as of June 2026.