Two international health plans sit side by side on a comparison sheet. Both show an annual limit of around USD 2,000,000. One will pay for a specialist consultation, a scan and a course of physiotherapy at a private clinic; the other will decline the entire episode because nobody was admitted to a hospital bed. Neither insurer has done anything improper, and neither policy is defective. They are simply built to different designs.
The international private medical insurance market runs on two architectures that are not variations of each other. In the first, benefits are bundled into levels of cover, and the level you buy is the cover you get. In the second, a core plan sits at the centre and named modules are bought around it, so a benefit you did not purchase is not reduced or capped — it is absent. The annual limit means something different in each case: in a bundled plan it is the ceiling over the whole package, and in a modular plan it is the ceiling over the core, which may be the only thing you own.
That is why headline limits are not comparable across architectures, and why the most useful question at the quotation stage is not how large the limit is but what the limit applies to.
Bundled tiers: the level you buy is the cover you get
Bupa Global's Global Health Plans are the clearest example. The range runs Major Medical, Select, Premier, Elite and Ultimate, and the four standard plans share the same benefit categories, differing by annual limit and by restrictions on particular services. Out-patient consultations, diagnostics, dental and optical, maternity, mental health, evacuation and repatriation all sit inside the tier rather than being bolted on.
AXA Global Healthcare uses the same approach across five cover levels, and publishes what arrives at each step. Foundation covers in-patient and day-patient treatment, surgery and cancer. Standard adds emergency treatment in the USA and non-routine dental. Comprehensive adds out-patient treatment, kidney dialysis and eye tests. Prestige adds routine pregnancy and childbirth, annual health checks and palliative care. Prestige Plus adds routine dental. The consequence is precise: out-patient treatment is not something you can add to a Foundation or Standard plan. To obtain it you move to Comprehensive and take everything else that comes with it.
William Russell's personal range is the same design at a different scale, and it makes a useful point about limits. Bronze and SilverLite carry the same annual limit — USD 1,500,000, or the stated sterling and euro equivalents — and differ almost entirely in the shape of the out-patient benefit beneath it. Bronze is hospital-led with limited out-patient cover; SilverLite carries a banded out-patient allowance running from USD 5,000 to USD 10,000; Silver moves to full out-patient cover, preventive cancer screening and well-being benefits at a USD 2,500,000 limit; Gold adds basic dental, an accidental death benefit, a cancer cash benefit and routine maternity at USD 5,000,000. Two plans, one identical headline number, and a materially different product underneath it.
Core plus modules: what you did not buy is not there
Cigna Global publishes the cleanest modular structure in the market. The core is named International Medical Insurance and covers in-patient, day-patient and accommodation costs, cancer and mental health care. Four optional modules sit alongside it: International Outpatient, International Vision and Dental, International Health and Wellbeing, and International Medical Evacuation.
Two of Cigna's own statements about that structure deserve to be read slowly, because they cut against what most buyers assume an international policy does. Emergency treatment that does not require admission as an in-patient or day-patient is covered only where the International Outpatient option has been purchased. And cover for medical evacuation or repatriation is available only under the International Medical Evacuation option.
Those are the two benefits people most reliably assume are inherent to international cover. A fall that needs stitching and an X-ray, a fever investigated in an emergency department, a chest pain that turns out to be nothing — none of these involve an admission, and on a core-only plan none of them are covered. Evacuation is the same story from the other direction: the benefit that makes an international policy feel international is, on this architecture, an optional purchase.
The boundary between core and module is also drawn in places that are not intuitive. Cigna's core does include local road and air ambulance paid in full, but the air ambulance element is limited to distances of up to 100 miles, and mountain rescue services are not covered at all. Reading the architecture tells you where to look; it does not remove the need to read the benefit line.
Allianz Care's legacy structure was more modular still: a Core Plan covering in-patient and day-care treatment, evacuation, home nursing and rehabilitation, with an Out-patient Plan at four levels, a Maternity Plan, two Dental Plans and a separate Repatriation Plan bought around it. That structure also carried a design constraint worth knowing about, because it is the kind of rule that only surfaces at quotation: a deductible could attach to the Core Plan or to the Out-patient Plan, but not to both.
The biggest number is not the best plan
Bupa Global's published limits do not increase in line with comprehensiveness. Major Medical carries £2,000,000, Select £1,000,000, Premier £1,500,000, Elite £3,000,000 and Ultimate is unlimited. Major Medical therefore sits above two of the plans that are more comprehensive than it.
That is not an error in the range. Major Medical is a catastrophic, hospital-led design, and a very large limit is inexpensive to offer when the frequent, low-value benefits that generate most claims are not present. The same plan is also narrower on geography: it is available on worldwide or worldwide without the USA, while the plans above it also offer worldwide without the USA or Europe. Read across the whole specification and the ranking makes sense; read the limit column alone and it does not. The same discipline applies to annual benefit limits and inner limits generally, where the headline figure is frequently the least binding constraint in the document.
Architecture moves, and recently
Allianz Care relaunched its individual range on 19 November 2025 as Care Base, Care Enhanced and Care Signature, primarily for the EU and UK markets with other regions to follow. The structural change is that medical repatriation is now embedded across all offerings rather than sold as a separate Repatriation Plan. Out-patient benefits remain add-ons, so the range is now a hybrid rather than a fully modular design.
Bupa Global demonstrates that a single insurer can operate both models at once. Alongside the bundled Global Health Plans it sells the Lifeline range at three levels — Essential, Classic and Gold — where evacuation and repatriation are an optional Assistance cover and US cover is a separate option rather than an area selection. The insurer's name on the certificate tells you nothing about which architecture you hold.
Most real plans are hybrids
William Russell includes emergency medical evacuation on all four personal plans, then sells Medevac Plus as an option on top, adding evacuation where advanced imaging or cancer treatment such as radiotherapy or chemotherapy cannot be adequately provided locally, together with repatriation to the country of nationality where that falls within the coverage zone. Dental Basic and Dental Plus are optional in the same way. Here the module is not the benefit itself but an upgrade to it — a third pattern that neither of the pure models describes.
APRIL International's MyHealth International range runs four tiers, all of which include hospitalisation, medical evacuation and cancer treatment, with out-patient care, pharmacy, dental, optical, maternity and alternative medicine as add-ons. Its module dependencies are published and unusual: dental and optical are sold as a bundle other than on the entry tier, and maternity cannot be selected unless out-patient care has been selected first. Dependencies of that kind are invisible on a benefits table and only appear when you try to build the plan.
The cross-provider picture
| Provider and range | Architecture | Out-patient in core? | Evacuation in core? |
|---|---|---|---|
| Bupa Global — Global Health Plans | Bundled tiers | Yes | Yes |
| Bupa Global — Lifeline | Tiers plus two options | Classic and Gold yes, Essential no | No — optional Assistance cover |
| Cigna Global | Core plus four named modules | No — module | No — module |
| Allianz Care (2025 range) | Core plus optional out-patient and dental | No — module | Repatriation now embedded |
| Allianz Care (legacy) | Core plus four modules | No | Repatriation Plan was optional |
| AXA Global Healthcare | Bundled cover levels | From Comprehensive upward | Yes |
| William Russell | Tiers plus upgrade options | Varies by tier | Yes, with optional Medevac Plus |
What to establish before comparing two quotations
Work out which architecture each quotation describes, then establish what the annual limit applies to. Confirm whether out-patient cover exists at all, and if so whether it is full or banded. Check whether evacuation is core, a module or an upgrade, since all three arrangements are live in the market — the mechanics are covered in the existing guide to medical evacuation and repatriation. Find out where any excess or deductible attaches, because on some designs it can sit on the core or the out-patient benefit but not both, a point developed in deductibles, excess and co-insurance. Check whether your chosen tier restricts the areas of cover available to you, as Bupa's Major Medical does, and what a worldwide excluding USA selection removes.
Where a benefit is genuinely optional, core cover versus optional modules sets out how to decide what to keep, and the legacy guide to building modular cover covers the assembly sequence. Maternity deserves separate attention because it carries waiting periods that differ by insurer regardless of architecture — see maternity cover under international health insurance. For a provider-by-provider view of the four largest carriers, the existing IPMI plans compared guide sets out the ranges side by side, and the plan builder works through the same decisions interactively.
Two further points sit outside plan design but change the answer. The company whose name appears on the plan is often not the company carrying the risk, which is the subject of who carries the risk. And whichever architecture you buy, the contract is a 12-month one, so the structure you select this year is not necessarily the structure you renew into — see annual renewability and guaranteed renewal.
Frequently asked questions
Does a higher annual limit mean better cover?
No, and Bupa Global's own range demonstrates why. Major Medical carries a published annual limit of £2,000,000, above both Select at £1,000,000 and Premier at £1,500,000, because Major Medical is a catastrophic hospital-led design rather than a lower rung of the same ladder. A large limit is inexpensive to offer when the everyday benefits that generate most claims are not in the plan at all. The limit describes a ceiling, not the contents of the room.
Is medical evacuation always included in an international health plan?
It is not. Cigna Global states that cover for medical evacuation or repatriation exists only where the International Medical Evacuation option has been purchased, and Bupa Global's Lifeline range treats evacuation and repatriation as an optional Assistance cover. Other designs embed it: Allianz Care moved medical repatriation into core across its November 2025 range, and William Russell includes emergency medical evacuation on all four personal plans with an optional Medevac Plus upgrade above it.
What is the difference between a tier and a module?
A tier is a complete package of benefits sold at one level, so moving up buys everything the higher level contains. A module is a discrete block of benefits bought alongside a core plan, so declining it removes those benefits entirely regardless of which core level you hold. The practical consequence is that on a tiered plan you cannot buy out-patient cover on its own, and on a modular plan you can hold a very high core limit with no out-patient cover whatsoever.
Why can two quotes with the same limit differ so much in price?
Usually because they are not covering the same events. A modular quote may show a core limit only, with out-patient, dental, wellbeing and evacuation priced separately or omitted, while a bundled tier quote includes them inside the level. Area of cover, the excess or deductible and its point of attachment, and whether inner limits apply to individual benefit lines will also move the figure. Comparing headline limits alone compares almost nothing useful.
Do modular plans let you add cover later?
Generally yes, but not on the same terms. Adding a benefit mid-policy or at renewal is usually treated as an enhancement to cover and is subject to fresh medical underwriting, so any condition that has arisen since you first joined can be excluded from the newly added benefit. Waiting periods attached to the new benefit also start again. The freedom that makes modular plans attractive at outset is materially narrower once your medical history has moved on.
Which architecture is better for an expat family?
Neither is inherently better, because the two answer different questions. Bundled tiers suit people who want a predictable package and do not want to make benefit-by-benefit decisions; core-plus-modules suits people with a clear view of what they will and will not use, and who want to strip out benefits to control premium. What matters is knowing which one you are buying, because the failure mode of a modular plan is a benefit that is simply absent rather than limited.
This guide is general information only and does not constitute financial, legal, medical or tax advice. Global Investments is not authorised by the Financial Conduct Authority. Insurance products, benefit schedules and premiums are revised regularly, and mandatory health insurance requirements change frequently — in several jurisdictions they are described differently even between official sources. Nothing here is a recommendation of any product or insurer. Confirm the legal position with the relevant regulator or a locally qualified adviser, and confirm cover terms with the insurer, before acting.