International health insurance: does an expat in Luxembourg need it?

First: the CNS is not optional

Employee or self-employed, anyone working in Luxembourg must be affiliated through the Joint Social Security Centre and is therefore covered by health insurance, the CNS for the private sector. Your spouse and children can be co-insured. International health insurance therefore does not replace the CNS: it comes on top. For everyday care in Luxembourg, a local top-up plan built on CNS reimbursements is usually the simplest answer; see our health insurance comparison and our table of CNS reimbursements.

When international cover makes sense

• You are not, or no longer, affiliated: arriving without a job contract, a spouse who cannot be co-insured, a gap between jobs. After at least six months of continuous affiliation, a resident keeps entitlement to care for the month affiliation ends and the following three months; after that, you need co-insurance, voluntary affiliation with the Joint Social Security Centre or private first-euro cover. Locally, DKV Complete Health is available even without registration with the statutory fund.
• You spend time outside Europe: in a country with no agreement with Luxembourg, such as the United States or Australia, you pay upfront, and the CNS reimburses urgent care only at Luxembourg rates and tariffs; planned outpatient care there is not reimbursed at all. The CNS itself then suggests specialised insurance to cover the difference.
• You want to choose where you are treated: an international policy covers planned care throughout its geographical area, whereas the CNS requires prior approval for a planned hospital stay outside Luxembourg. The insurer may also ask for pre-authorisation before a hospital stay.
• You move country every two or three years: the policy follows you from one posting to the next, without starting from scratch at each move.

The four main providers at a glance

Plans as listed on the insurers’ websites in September 2026. Exact benefits, exclusions and waiting periods are set out in the policy documents.

What to check before signing

• Medical history: questionnaire, exclusions, loadings or moratorium underwriting depending on the insurer.
• Waiting periods, especially for maternity.
• Area of cover: including the USA is a separate choice, and it costs more.
• Double cover: the CNS and an international policy do not coordinate automatically; for care in Luxembourg, you may pay twice for the same benefit.
• Tax: premiums are deductible, within the €672 per household member ceiling, only if the insurer is authorised in Luxembourg, or authorised and established in another EU member state. What counts is the insurer carrying the risk, not the brand: Cigna Global, for example, is underwritten by a Guernsey company, and Guernsey is not an EU member state.

For how this fits with your other policies on arrival, see our first-30-days checklist and our expat insurance comparison.