Full medical underwriting health insurance how it works and what it means for you

If you're comparing ways to arrange health insurance, you'll come across two main underwriting methods: full medical underwriting and moratorium underwriting. Full medical underwriting health insurance policies ask you to declare your complete medical history at the point of application, rather than working out what's excluded only when you come to claim.

Under full medical underwriting, you complete a detailed application form covering your medical history, usually for the past five to ten years. This includes any conditions you've been diagnosed with, treatments you've had, medication you're taking, and sometimes relevant family medical history. The insurer's underwriting team then assesses this information and confirms your terms before your policy starts.

The result is a policy where you know exactly where you stand from day one. If a condition is excluded, it's named specifically in your policy documents rather than being covered by a general, rolling exclusion that might apply to conditions you haven't even thought to mention.

Why insurers use full medical underwriting

Insurers use full medical underwriting to price risk accurately and to avoid covering conditions that already existed before the policy began. Without some form of underwriting, everyone would pay the same price regardless of health, which would push premiums up for everyone.

For you as the applicant, the trade-off is time and paperwork upfront in exchange for clarity later. You'll know, before you commit to a policy, precisely which conditions are covered and which aren't.

The full medical underwriting process happens once, at the point you apply, rather than each time you make a claim. Here's what to expect.

You'll complete an application form, either online, over the phone with an advisor, or on paper, answering questions about your medical history. This typically covers the last five to ten years and asks about diagnosed conditions, symptoms, investigations, treatments, medications, and sometimes hospital admissions. Some insurers also ask about family history for certain conditions, such as some cancers or heart disease.

When a GP report is needed

If your answers suggest a condition needs more detail, such as a diagnosis with an unclear outcome or an investigation that hasn't been fully resolved, the insurer may ask for a report from your GP. This is sometimes called a GP report or GPR. You'll need to give consent for your GP to release this information, and your GP practice may charge a fee to prepare it.

Waiting for a GP report is usually the slowest part of the full medical underwriting process. GP practices can take several weeks to respond, particularly if they're dealing with a high volume of requests, so it's worth applying with plenty of time before you need cover to start.

The underwriting decision

Once the insurer has everything it needs, its underwriting team decides how to handle any conditions you've disclosed. There are three main outcomes for a disclosed condition: it's covered as standard, it's excluded by name, or it's covered with an additional premium. You'll receive a personalised policy schedule setting out any exclusions or loadings that apply to you before your cover starts.

Moratorium underwriting is the main alternative to full medical underwriting, and it's the default method many insurers use unless you ask for full medical underwriting instead. Rather than asking you to complete a detailed medical questionnaire, a moratorium policy applies an automatic, rolling exclusion to any condition you've had symptoms, treatment, medication, or advice for in a set period before your policy started, typically the last five years.

That exclusion isn't necessarily permanent. If you go a specified period, often two years, without any symptoms, treatment, or medication for that condition after your policy starts, it can automatically become covered again without you needing to do anything.

The key differences

The practical difference comes down to certainty versus speed. With full medical underwriting, you know exactly what's excluded before you buy, because it's named in your policy documents. With moratorium underwriting, you won't necessarily know whether a condition is excluded until you try to claim and the insurer checks your medical records against the rolling exclusion period.

A pre-existing condition is any illness, injury, or condition you had symptoms of, sought advice for, or received treatment for before your policy started, whether or not you had a formal diagnosis. Under full medical underwriting, you need to disclose these when you apply, even if they seem minor or you think they've fully resolved.

Insurers generally ask about:

• Conditions you've been diagnosed with, whether currently active or resolved
• Symptoms you've experienced but not yet had investigated
• Ongoing medication, even for well-managed conditions like high blood pressure or asthma
• Hospital admissions, surgery, or specialist referrals
• In some cases, relevant family history, particularly for conditions with a genetic link

Why accurate disclosure matters

It's important to answer every question honestly and completely. If you don't disclose a condition and later need to claim for it, the insurer can investigate your medical records at that point. If it finds a relevant condition wasn't declared, it can refuse the claim, and in serious cases, cancel the policy altogether. This applies even if the non-disclosure was accidental rather than deliberate, so it's worth taking your time over the application and checking your medical records if you're unsure about dates or details.

If you're not sure whether something counts as a pre-existing condition, disclose it and let the insurer decide. Speak to an advisor if you want help working through your medical history before you apply.

Once you've disclosed a condition, the insurer has a few ways to respond. Most commonly, it will apply what's called a personal exclusion, meaning that specific condition, and anything directly related to it, won't be covered under your policy. This is written into your policy schedule by name, so you know exactly what it applies to.

Less commonly, for conditions that carry a higher but manageable risk, the insurer might offer cover with an additional premium rather than excluding it outright. In a small number of cases, particularly for very serious or recent conditions, the insurer may decline to offer cover for that condition, or in rare cases, decline the application altogether.

Can exclusions be reviewed later?

Many insurers will review a named exclusion after a set period, often two years, if you haven't had symptoms, treatment, or medication for that condition in the meantime. If your health has genuinely moved on, the insurer may lift the exclusion and cover the condition going forward. This isn't automatic in the way a moratorium review is, so you may need to ask your insurer to reassess an exclusion rather than waiting for it to happen on its own.

It's worth checking your policy documents or asking an advisor about your insurer's review process when you take out cover, so you know what to expect and when.

Full medical underwriting and moratorium underwriting are the two methods you'll most often see on individual and family health insurance policies, but there are a couple of others worth knowing about, particularly if you're covered through work or switching provider.

Medical history disregarded

Medical history disregarded, sometimes shortened to MHD, is mostly used for larger employer group schemes. Under this method, the insurer doesn't take your medical history into account at all when deciding whether to offer you cover, which means it's typically only available where a scheme has enough members to spread the risk. It's rarely offered on individual policies.

Continued personal medical exclusions

If you're switching from one insurer to another, some insurers offer continued personal medical exclusions, sometimes shortened to CPME. Rather than starting your underwriting from scratch, the new insurer honours the same exclusions your previous insurer applied, without adding new ones for conditions you've already disclosed. This can be useful if you want to switch provider without losing any cover you've already built up, though it depends on both insurers involved and isn't offered as standard by every insurer.

If you're moving from an employer scheme to an individual policy, or between insurers generally, it's worth asking specifically about continued personal medical exclusions before you commit, since the terms can vary considerably.

Full medical underwriting isn't automatically the right choice for everyone. Weighing up the advantages and disadvantages against your own circumstances will help you decide whether it, or moratorium underwriting, suits you better.

Advantages

• You know exactly what's covered and what's excluded before your policy starts, with no uncertainty about how a rolling exclusion might apply
• Exclusions are specific and named, rather than a general exclusion that could catch conditions you haven't thought to mention
• It can work well if you're switching insurer and want to carry over known exclusions rather than restart a moratorium period
• Some insurers price full medical underwriting policies more accurately for individuals with a genuinely clean medical history

Disadvantages

• The application takes longer to complete, and can take several weeks if a GP report is needed
• You need to recall and disclose your medical history accurately, which can take time if it's complex
• If you have several pre-existing conditions, you may end up with multiple exclusions or premium additions
• Non-disclosure, even if accidental, can put a future claim at risk

Full medical underwriting tends to suit people who want certainty over speed. It's worth considering if:

• You have one or more existing medical conditions and want to know exactly how they'll be treated before you commit to a policy
• You're switching insurer and want to explore continued personal medical exclusions rather than restarting a moratorium period
• You have a generally clean medical history and want your premium to reflect that accurately
• You'd rather have a clear answer upfront than find out what's excluded only when you come to claim

Moratorium underwriting is often a better fit if you have a straightforward medical history, want cover to start quickly, or would rather avoid completing a detailed medical questionnaire. Since the right choice depends on your own health history and priorities, it's worth talking it through with an advisor before you apply.

If you decide full medical underwriting is right for you, a bit of preparation makes the application quicker and reduces the chance of delays.

Before you apply

• Gather dates and details of any past diagnoses, treatments, or medication, including approximate dates if you're not certain
• Check with your GP practice if you're unsure about your own medical history
• Have details of current medication and dosages to hand
• Ask your advisor which insurers are most likely to offer favourable terms for your specific conditions, since underwriting decisions vary between insurers

During the application

Answer every question as fully and accurately as you can, even for conditions that feel minor or long resolved. If a question is unclear, ask rather than guess. If you're applying with an advisor, they can help you interpret medical terminology and make sure nothing is accidentally left out.

After you apply

If the insurer needs a GP report, allow several weeks for your GP practice to respond. Once the underwriting decision is issued, read your policy schedule carefully so you understand any exclusions or additional premiums that apply before your cover starts.