When considering private health insurance, one of the most important – and often misunderstood – aspects of your policy is medical underwriting.
The type of underwriting you choose can affect how pre-existing conditions are treated, what information you’ll need to provide, and what level of certainty you have about your cover. Understanding your options before taking out a policy can help you avoid surprises later and ensure you select the most suitable protection for your needs.
What Is Medical Underwriting?
Medical underwriting is the process insurers use to assess your health and medical history when you apply for private health insurance.
Its purpose is to determine how any existing or previous medical conditions will be treated under your policy. Unlike car or home insurance, where risks are often based on physical assets, private health insurance focuses on your personal health history and the likelihood of future medical claims.
The underwriting process helps insurers decide which conditions can be covered and which may need to be excluded.
Why Is Medical Underwriting Important?
Many people assume that private health insurance covers every medical condition from day one. However, most policies do not cover pre-existing medical conditions, and underwriting is how insurers identify and manage these risks.
Understanding your underwriting option can help you:
- Know what information you need to disclose
- Understand how pre-existing conditions are treated
- Avoid unexpected claim rejections
- Compare policies more effectively
- Choose the level of certainty that suits you
The Main Types of Medical Underwriting
There are several underwriting methods available in the UK private health insurance market, with the two most common being Moratorium Underwriting and Full Medical Underwriting.
Moratorium Underwriting
Moratorium underwriting is often the simplest option because you do not usually need to complete a detailed medical questionnaire when applying.
Instead, the insurer automatically excludes any medical conditions for which you have experienced symptoms, sought advice, received treatment, or taken medication during a specified period before the policy started (typically the previous five years).
However, these conditions may become eligible for cover in the future if you remain free from symptoms, treatment, medication, and medical advice for a continuous period, usually two years after your policy begins.
Advantages of Moratorium Underwriting
- Faster and simpler application process
- No detailed medical questionnaire required
- Suitable for individuals with relatively straightforward medical histories
Things to Consider
- You may not know immediately whether a condition will be covered in the future
- Claims assessments can sometimes require a review of your medical records
- There may be uncertainty around conditions that have occurred in the past
Full Medical Underwriting (FMU)
With Full Medical Underwriting, you complete a detailed medical questionnaire when you apply for cover.
The insurer reviews your medical history before the policy starts and informs you of any conditions that will be permanently excluded from cover.
This approach provides greater clarity from the outset because you’ll know exactly what is and isn’t covered.
Advantages of Full Medical Underwriting
- Clear confirmation of exclusions from the start
- Greater certainty when making future claims
- Reduced ambiguity around pre-existing conditions
Things to Consider
- The application process can take longer
- More medical information is required
- Your GP may be contacted for additional details if necessary
What Are Pre-Existing Conditions?
A pre-existing condition is generally any illness, injury, symptom, or medical issue that existed before your policy began.
Examples may include:
- Asthma
- Diabetes
- Arthritis
- High blood pressure
- Back pain
- Mental health conditions
- Joint injuries
Each insurer defines pre-existing conditions slightly differently, so it’s important to review policy documentation carefully or seek professional advice.
Continued Personal Medical Exclusions (CPME)
If you already have private medical insurance and are switching insurers, you may be offered Continued Personal Medical Exclusions (CPME).
This allows you to transfer your existing underwriting terms to a new insurer without undergoing a completely new medical assessment.
In many cases, any exclusions applied by your previous insurer simply continue with the new policy.
CPME can make switching providers easier while maintaining continuity of cover.
Does Medical Underwriting Affect Your Premium?
Many people assume that declaring medical conditions automatically increases their premium. In reality, private health insurance premiums are usually influenced more heavily by factors such as:
- Your age
- Where you live
- The level of cover selected
- Hospital access options
- Excess levels
- Optional policy benefits
Medical underwriting primarily affects what conditions are covered rather than the price you pay.
Which Underwriting Option Is Right for You?
There is no one-size-fits-all answer. The best option depends on your circumstances, medical history, and personal preferences.
Moratorium Underwriting may be suitable if you:
- Want a quick and straightforward application process
- Have a relatively uncomplicated medical history
- Are comfortable with some uncertainty regarding future claims
Full Medical Underwriting may be suitable if you:
- Want complete clarity from the outset
- Have a more complex medical history
- Prefer knowing exactly which conditions are covered
CPME may be suitable if you:
- Already have private medical insurance
- Are considering switching providers
- Want to maintain continuity of underwriting terms
Final Thoughts
Medical underwriting is one of the most important aspects of private health insurance because it determines how pre-existing conditions are treated and what level of certainty you have about your cover.
Whether you choose Moratorium Underwriting, Full Medical Underwriting, or Continued Personal Medical Exclusions, understanding the differences can help you make a more informed decision and avoid unexpected surprises when making a claim.
If you’re unsure which underwriting option is right for you, speaking with an experienced health insurance adviser can help you compare policies and find the cover that best meets your healthcare needs and budget.

















