How Many Conditions Does Critical Illness Insurance Cover?
Every critical illness insurance policy in the UK includes a defined list of medical conditions that qualify for a payout. The number of conditions varies considerably between insurers: core policies typically cover around 35 conditions, while comprehensive plans can cover 80 to 90. Aviva offers 34 conditions on its standard plan or 73 on its upgraded plan. Vitality covers up to 174 conditions across 3 levels. LV= covers 40 conditions as standard. However, the vast majority of successful claims, roughly 85%, fall under just three conditions: cancer, heart attack, and stroke.
Understanding exactly which conditions are covered, and how each one is defined, is essential before you purchase a policy. The name of a condition on a policy document does not always match what you might consider that condition to be in everyday language. Insurers use precise medical definitions with specific severity thresholds that must be met before a claim is paid.
For a broader overview of how critical illness cover works, see our guide on what is critical illness cover.
Core Conditions Covered by All UK Policies
The ABI has established model definitions for a set of core conditions that all UK critical illness policies must include. These are the conditions most likely to result in a claim and account for the overwhelming majority of payouts.
| Core Condition | % of Claims | Key Definition Points |
|---|---|---|
| Cancer | ~65% | Must be malignant; excludes certain early-stage and non-invasive cancers |
| Heart attack | ~12% | Requires raised cardiac biomarkers and evidence of muscle damage |
| Stroke | ~8% | Must cause neurological deficit persisting for at least 24 hours |
| Multiple sclerosis | ~4% | Confirmed diagnosis with persisting neurological symptoms |
| Coronary artery bypass | ~3% | Surgical bypass using open-chest or keyhole techniques |
| Kidney failure | ~2% | Irreversible end-stage renal failure requiring dialysis or transplant |
| Major organ transplant | ~2% | Must be on UK transplant list or have received a human donor organ |
| Other core conditions | ~4% | Includes blindness, deafness, coma, Parkinson's, and others |
Cancer: The Most Common Claim
Cancer accounts for approximately two-thirds of all critical illness claims in the UK. However, not all cancers qualify for a full payout. The ABI model definition requires cancer to be malignant, meaning it must involve uncontrolled growth and spread of malignant cells. The definition explicitly excludes certain types:
- Non-invasive skin cancers, basal cell carcinoma and squamous cell carcinoma are excluded, though malignant melanoma is covered
- Carcinoma in situ, pre-malignant changes that have not invaded surrounding tissue are typically excluded from a full payout
- Early-stage prostate cancer, tumours classified as T1a or T1b with a Gleason score below 7 may not qualify
- Chronic lymphocytic leukaemia, early-stage CLL (Rai stage 0) is excluded by some policies
Many enhanced policies offer partial payments (typically 10% to 25% of the sum assured) for less advanced cancers that do not meet the full severity threshold. This can provide a financial cushion during treatment even when the full payout criteria are not met.
Heart Attack and Stroke Definitions
Heart attack and stroke are the second and third most common critical illness claims. Both have specific clinical criteria that must be satisfied.
Heart attack
The ABI model definition requires evidence of the death of heart muscle due to inadequate blood supply. This must be confirmed by characteristic rise and fall of cardiac biomarkers (such as troponin) and at least one of the following: typical symptoms, new ECG changes, or imaging evidence of loss of viable heart muscle. Minor heart events that do not meet these thresholds may qualify for a partial payment under enhanced policies.
Stroke
A stroke must cause neurological deficit with clinical symptoms persisting for at least 24 hours, or result in death within 24 hours. Transient ischaemic attacks (TIAs), sometimes called mini-strokes, do not qualify because symptoms resolve within 24 hours. Imaging evidence from CT or MRI scans is typically required to confirm the diagnosis.
Enhanced vs Standard Cover
There is a significant difference between standard and enhanced critical illness policies, and understanding this distinction can directly affect whether a claim is paid.
Standard cover
Standard policies cover the ABI core conditions plus a limited number of additional conditions. The total is usually between 40 and 60 conditions. Payouts are typically all-or-nothing: either your condition meets the full severity definition and you receive the entire lump sum, or it does not and you receive nothing.
Enhanced cover
Enhanced or comprehensive policies extend coverage to 100 or more conditions. They also introduce partial payment conditions, which pay a percentage of the sum assured for less severe diagnoses. Enhanced policies often include free children's critical illness cover and may offer additional payouts for further unrelated conditions after an initial claim.
Partial Payments and Additional Conditions
Partial payments, sometimes called additional payments, are a feature of enhanced critical illness policies. They provide a reduced payout, typically between 10% and 25% of the sum assured, up to a cap of around £25,000, for conditions that do not meet the full severity threshold.
Common partial payment conditions include:
- Early-stage cancers (carcinoma in situ, ductal carcinoma in situ)
- Less advanced heart conditions (angioplasty, minor heart attack)
- Early-stage Parkinson's disease
- Small benign brain tumours
- Pituitary tumours
Importantly, receiving a partial payment does not end your policy. Your remaining cover continues at the reduced sum assured (original amount minus the partial payment), so you can still make a full claim later if a more serious condition develops.
Children's Critical Illness Conditions
Many enhanced policies include free cover for your children as an automatic benefit. The conditions covered for children are often similar to the adult list, but may also include additional conditions more common in childhood. For a detailed look at this topic, read our guide on children's critical illness cover.
Children's cover typically pays a fixed lump sum (commonly £25,000) and covers conditions such as:
- Cancer (childhood cancers including leukaemia)
- Meningitis with lasting complications
- Cerebral palsy
- Muscular dystrophy
- Congenital heart disease requiring surgery
- Type 1 diabetes
Conditions NOT Covered
It is just as important to understand what critical illness cover does not pay for. Common exclusions and limitations include:
- Mental health conditions, depression, anxiety, bipolar disorder, and other psychiatric conditions are not covered by any UK CIC policy
- Chronic fatigue syndrome (ME/CFS), not included on any standard or enhanced policy
- Back pain and musculoskeletal conditions, these are common causes of time off work but are not covered by CIC
- Repetitive strain injuries, conditions like carpal tunnel syndrome are excluded
- Pre-existing conditions, conditions diagnosed before the policy started are typically excluded. See our guide on critical illness and pre-existing conditions
- Conditions that do not meet severity thresholds, a diagnosis alone is not enough; the condition must reach the level of severity defined in the policy
- Self-inflicted injuries, conditions caused by deliberate self-harm are excluded
- HIV/AIDS, most policies exclude this, though some cover it if contracted through specific circumstances such as a blood transfusion or occupational exposure
How to Compare Conditions Across Insurers
When comparing critical illness policies, do not simply count the number of conditions covered. Instead, focus on the quality and breadth of the definitions for the conditions most likely to result in a claim. A policy covering 170 conditions with narrow definitions may be less useful than one covering 80 conditions with broader, more generous definitions.
Key things to check when comparing:
- Cancer definition, which early-stage cancers are included or excluded? Are partial payments available?
- Heart attack definition, does the policy use the latest ABI model definition or an older, more restrictive one?
- Stroke definition, is there a requirement for symptoms to persist beyond 24 hours?
- Partial payments, are they available, and what is the cap?
- Children's cover, is it included free, and what conditions are listed?