You moved to France for the light, the space, the slower mornings — and then a letter arrives from your local health fund, the Caisse Primaire d’Assurance Maladie (CPAM, the local branch of French state health insurance that registers residents and pays reimbursements), telling you that you are not covered. Or worse: a hospital invoice for several thousand euros lands on the doormat after a night in urgences (accident and emergency), because somewhere between the S1 form you never registered, the three-month residence rule nobody explained and the top-up insurance you assumed you did not need, you fell through the cracks. Since Brexit, British citizens are third-country nationals in France, and healthcare is one of the areas where that change bites hardest. The good news is that the French system is genuinely universal once you are inside it: the statute promises that “Toute personne travaillant ou, lorsqu’elle n’exerce pas d’activité professionnelle, résidant en France de manière stable et régulière bénéficie, en cas de maladie ou de maternité, de la prise en charge de ses frais de santé dans les conditions fixées au présent livre” (Article L160-1 of the Social Security Code). The bad news is that every word of that sentence — working, residing, stable, regular — is a potential refusal ground if your file is thin. This guide explains, for a British reader, the three doors into French healthcare after Brexit — the S1 for pensioners and certain insured people, PUMa (Protection Universelle Maladie, the universal residence-based cover) for everyone else, and the visitor cards for short stays — and then sets out exactly what to do when the CPAM says no or the hospital sends a bill: how to repair the file, which remedies to use, in which order, and before which court.
I. I live in France — how do I get French healthcare as a Briton after Brexit?
French healthcare is not free at the point of use in the British sense. The state reimburses roughly 70 per cent of most standard fees (80 per cent for hospital stays, 100 per cent for a list of serious long-term conditions), and patients pay the balance — the ticket modérateur (the co-payment left to the patient) — out of pocket or through a top-up policy called a mutuelle (voluntary top-up health insurance). The UK government’s own guidance for British nationals in France confirms the shape of the system: French state care is not free: treatment costs are shared between the state and the patient through co-payments, some treatment has to be paid for upfront, and the local health fund — the Caisse Primaire d’Assurance Maladie (CPAM) — then reimburses part of the cost later (Healthcare for UK nationals living in France, GOV.UK). That same guidance lists the three normal routes in: contributions through French work, a UK-issued S1 registered with the CPAM, or a visitor card for temporary stays. Understanding which door is yours is the whole battle, because applying through the wrong one is the single most common cause of refusal.
A. I draw a UK State Pension or am covered by the UK — should I use an S1 form?
An S1 (the portable document by which one state certifies that it will pay for your healthcare in another state) is a certificate issued by the UK — in practice by the NHS Business Services Authority’s Overseas Healthcare Services — stating that the United Kingdom remains competent for your healthcare costs while you live in France. It is available principally to people who draw a UK State Pension, to some people receiving certain UK benefits such as contribution-based Employment and Support Allowance, and to posted workers sent temporarily by a UK employer. If you hold an S1 and register it with your local CPAM, France provides your day-to-day care and bills the United Kingdom behind the scenes. You are then treated essentially like a French insured person for the scope of care, including hospital treatment, while the financing stays British. For a retired Briton in the Dordogne or the Languedoc, this is normally the correct and by far the simplest route — and it exempts you from the three-month waiting logic described below, because your entitlement derives from the UK’s competence, not from your French residence alone.
Three practical points decide whether the S1 route succeeds. First, the S1 must actually be issued and then registered: holding a pension is not enough on its own, and the CPAM cannot bill London for you until your certificate is on its system, so apply to the Overseas Healthcare Services before you need care and chase the registration receipt (récépissé, the stamped acknowledgement proving your file was lodged). Second, the S1 covers the holder and, on the form’s face, the dependent family members named on it — but each family member’s position should be checked individually, because a working spouse may fall under French legislation through their own employment instead. French law itself makes employment the primary trigger: “Sous réserve des traités et accords internationaux régulièrement ratifiés ou approuvés et des règlements européens, sont affiliées à un régime obligatoire de sécurité sociale dans le cadre du présent code, quel que soit leur lieu de résidence, toutes les personnes” who work in France (Article L111-2-2 of the Social Security Code), which means a Briton who takes a French job is insured through French contributions and should not normally need an S1 at all. Third, the S1 does not pay the patient’s share: the ticket modérateur, daily hospital charges (forfait journalier, the fixed daily hospital fee) and any excess fees (dépassements d’honoraires, charges above the state tariff billed by some specialists) remain yours unless you hold a mutuelle or qualify for free top-up cover. Pensioners of modest means should therefore read the section on the Complémentaire santé solidaire below alongside their S1, because the two combine.
A final S1 warning concerns timing. Many British pensioners who moved before 2021 were covered under the EU–UK Withdrawal Agreement’s social-security coordination, and their S1s continued seamlessly. Those who arrived later rely on the same coordination machinery preserved for their category, but the administrative chain is longer and errors are frequent: S1s issued to the wrong address, CPAM registrations that stall, and gaps during which a hospital admission becomes self-funded. Keep copies of everything, note every date, and never surrender your only original. If the CPAM tells you your S1 “is not on the system”, that is an administrative state of affairs to be fixed with proof of issue and a written request for registration — not a legal conclusion that you are uninsured. The refusal and remedy machinery in Part II applies to S1 registrations exactly as it does to residence-based applications.
B. I do not work and have no S1 — can PUMa cover me after three months?
PUMa is the residence-based gateway: anyone who works in France, or who does not work but lives in France on a stable and regular basis, is entitled to state coverage of health costs. The statute, quoted in the introduction, is Article L160-1 of the Social Security Code, and the two qualifying adjectives are interpreted by neighbouring provisions: employment and residence conditions are assessed under Articles L111-2-2 and L111-2-3 of the same Code. For a British early retiree, a person living on savings, or the non-working partner of a worker, PUMa is the correct door — provided the residence is both stable and lawful. Stability is defined by regulation: “sont considérées comme résidant en France de manière stable les personnes qui ont leur foyer ou le lieu de leur séjour principal sur le territoire métropolitain, en Guadeloupe, en Guyane, à la Martinique, à La Réunion, à Saint-Barthélemy ou à Saint Martin” (Article R111-2 of the Social Security Code). Regularity means lawful presence, which is where Brexit changed everything: a British citizen staying more than three months must hold one of the residence documents the foreigners’ code requires, since “tout étranger âgé de plus de dix-huit ans qui souhaite séjourner en France pour une durée supérieure à trois mois doit être titulaire de l’un des documents de séjour suivants” (Article L411-1 of the Code on the Entry and Residence of Foreigners) — in practice, for most Britons, a long-stay visa followed by a titre de séjour (residence permit), or a Withdrawal Agreement card for those who were already resident before 2021. The UK guidance confirms the waiting rule in plain terms: the UK guidance confirms the waiting rule in plain terms — residents of at least three months’ standing can apply to join the French healthcare system under Protection Universelle Maladie (PUMa) (GOV.UK, Healthcare for UK nationals living in France), and adds that proof of cover may be demanded for visas and residence registration — a circularity that catches many newcomers, who need insurance to get residence and residence to get insurance. Private cover for the first months is therefore not a luxury; it is the bridge.
The three-month condition is the refusal ground you will meet most often, so it deserves precision. The implementing decree provides that applicants “doivent produire un justificatif démontrant qu’elles résident en France de manière ininterrompue depuis plus de trois mois” (Article D160-2 of the Social Security Code), while listing categories of people dispensed from that proof. The Court of Cassation has given that provision its full weight: “Selon l’article D. 160-2 du code de la sécurité sociale, dans sa rédaction issue du décret n° 2015-1882 du 30 décembre 2015, applicable au litige, les personnes qui demandent à bénéficier de la prise en charge des frais de santé en application des dispositions de l’article L. 160-5 peuvent produire un justificatif démontrant qu’elle résident en France de manière ininterrompue depuis plus de trois mois ou qu’elles relèvent de l’une des catégories qu’il énumère limitativement” (Court of Cassation, Second Civil Chamber, 3 June 2021, Appeal No 20-10.687). In practice, the CPAM expects documentary proof of continuous presence — rental receipts, utility bills, tax notices, school certificates — covering the whole period, and a file with a two-week gap in the paper trail can be treated as a file with a two-week gap in residence. Build the paper trail from day one: keep every lease, every facture EDF (electricity bill), every registered letter. British newcomers who split their time between the UK and France should be particularly careful, because frequent absences invite the objection that the French home is not the principal residence within the meaning of Article R111-2.
Once admitted, PUMa covers a broad basket defined by statute: “La protection sociale contre le risque et les conséquences de la maladie prévue à l’article L. 111-2-1 comporte : 1° La couverture des frais de médecine générale et spéciale, des frais de soins et de prothèses dentaires, des frais pharmaceutiques et d’appareils, des frais d’examens de biologie médicale, y compris la couverture des frais relatifs aux actes d’investigation individuels, des frais d’hospitalisation et de traitement dans des établissements de soins, de réadaptation fonctionnelle et de rééducation ou d’éducation professionnelle” (Article L160-8 of the Social Security Code). Those on low incomes can add the free or cheap top-up, the Complémentaire santé solidaire (C2S, the means-tested free or low-cost top-up cover): “Les personnes mentionnées à l’article L. 160-1 ont droit à une protection complémentaire en matière de santé dans les conditions suivantes” (Article L861-1 of the Social Security Code), with full gratuity below a decree-set ceiling and a modest contribution up to 35 per cent above it. And those who only visit — second-home owners spending a few weeks at a time — do not belong in PUMa at all: their route is the UK-issued Global Health Insurance Card (GHIC) or a surviving European Health Insurance Card (EHIC) for medically necessary state care during temporary stays, exactly as the NHS and GOV.UK pages describe. A GHIC is not residence cover, cannot be used to register with a médecin traitant (the nominated GP gatekeeper of the French system), and will not save you if the CPAM later decides you were actually resident and uninsured. Choosing the wrong door in either direction — PUMa when you are a visitor, GHIC when you are a resident — is how the worst bills are born.
II. CPAM said no, or the hospital sent a bill — what do I do now?
A refusal is rarely the end of the story; French social-security litigation is built on the assumption that funds get things wrong and that a structured appeal chain will correct them. The courts apply the same statutes to everyone “sans distinction de nationalité” (without distinction as to nationality), as the Court of Cassation recalled in the PUMa context (Court of Cassation, Second Civil Chamber, 3 June 2021, Appeal No 20-10.687), so a British applicant refused for want of a document stands on exactly the same legal ground as a French one. What matters is method: identify the true ground of refusal, repair what can be repaired, and challenge the rest through the compulsory prior appeal before going to court. Two recent trial-court decisions show the pattern from both ends — a hospital-bill dispute turning on Article L160-1 itself, and a refusal dispute turning on the admissibility of the court claim where the prior appeal was skipped.
A. My CPAM application was refused or ignored — how do I fix the file and stop the bill growing?
Start by reading the refusal letter the way a judge would. French funds use a small set of standard grounds, and each has its own repair. “Residence not stable” means the three-month paper trail failed: supply the missing months, add sworn statements (attestations sur l’honneur, signed declarations of fact) from landlords or neighbours only as a complement to objective documents, never as a substitute, and re-file with a covering letter mapping each document to each month. “Stay not regular” means the residence-permit side failed: check expiry dates, renewal receipts (récépissés), and whether a Withdrawal Agreement card application is still pending, because a pending renewal documented by receipt is a very different situation from an expired permit with nothing filed. “Already covered elsewhere” in an S1 case usually means the British certificate was never linked: send the CPAM a copy of the S1, proof of the date you requested registration, and a written demand for registration within a stated time. “No response at all” is legally a decision too — silence kept long enough becomes an implied refusal (décision implicite de rejet, the refusal the law presumes from prolonged administrative silence) that can itself be appealed, so diary the date of your application and the date silence crystallises rather than waiting indefinitely.
The hospital-bill variant follows the same logic with the amounts inverted. The Bobigny social chamber had to decide precisely such a case — a claim for hospital costs tested against Article L160-1 — opening its reasoning by setting out the statutory promise of Article L160-1 in full before measuring the invoices against it (Tribunal judiciaire de Bobigny, Social Chamber, 13 January 2026, RG No 24/02314). The lesson for a Briton facing a bill is direct: the hospital’s invoice assumes you were uninsured on the day of treatment, but if you were in fact working or stably and lawfully resident on that date, the fund — not you — bears the insured share, and the bill must be re-examined. So act on three fronts at once: ask the hospital’s billing office (le bureau des admissions et des frais de séjour) for an itemised statement and a payment freeze pending the CPAM decision; file or complete the CPAM affiliation with evidence covering the treatment date, expressly requesting retroactive effect to that date; and lodge the protective prior appeal described in the next section before any deadline expires. Never simply ignore a hospital invoice: unlike a CPAM refusal, it can be passed to a recovery body and enforced while you argue.
Two practical reinforcements cost nothing and win cases. First, every step must be provable: send letters by registered post with acknowledgement of receipt (lettre recommandée avec accusé de réception), keep the green slips, screenshot every online démarche (administrative step completed on the portal) on ameli.fr with its reference number, and store identity, passport stamps, boarding passes and tenancy documents in one dated bundle. Second, mind the clock from day one: social-security appeals run on short two-month deadlines from notification, and a late prior appeal can kill an otherwise winning case before a judge ever looks at the merits — which is exactly what happened to claimants who went straight to court, as the Annecy court demonstrated when it declared a direct court claim inadmissible for want of the compulsory prior appeal (Tribunal judiciaire d’Annecy, Social Chamber, 18 September 2025, RG No 24/00423, full decision). Repair the file, freeze the bill, and appeal in time: in that order.
B. How do I formally challenge a CPAM refusal or an unpaid-care bill in court?
The appeal chain has three links, and the order is compulsory. The first is the amicable appeal (recours amiable, the written request asking the fund to reconsider) before the fund’s own appeals board, the Commission de Recours Amiable (CRA, the in-house board that must re-examine the decision before any judge can be seised). The statute makes this step a gatekeeper, not an option: contentious claims in these matters “sont précédés d’un recours préalable, dans des conditions prévues par décret en Conseil d’Etat” (Article L142-4 of the Social Security Code). In practice this means a short, dated letter to the CRA identified on the refusal notice, enclosing the complete repaired file, sent by registered post within two months of notification of the refusal — or within two months of the birth of an implied refusal where the fund has stayed silent. Ask expressly for a reasoned written decision (décision motivée), because an unreasoned rejection is harder for the fund to defend and easier for you to attack. Keep the tone factual and the bundle complete: the CRA file becomes the court file, and documents produced for the first time before the judge carry less weight than a coherent story told from the start.
If the CRA rejects the claim — or stays silent, which after the regulatory period counts as rejection — the second link is the court: the social chamber (pôle social, the specialist social-security division) of the tribunal judiciaire (the ordinary civil court that hears social-security disputes) for the fund’s area. Jurisdiction follows the statute: “Le juge judiciaire connaît des contestations relatives : 1° Au contentieux de la sécurité sociale défini à l’article L. 142-1 ; 2° Au contentieux de l’admission à l’aide sociale défini à l’article L. 142-3” (Article L142-8 of the Social Security Code). The claim is lodged by declaration or writ within two months of the CRA’s decision, must name the correct fund (a claim directed at the wrong body is thrown out, as courts regularly recall), and should seek precisely what is owed: affiliation with effect from the qualifying date, reimbursement of the specific invoices listed with dates and amounts, and interest. Representation by a lawyer is not compulsory at first instance, but for a British litigant arguing in French about residence evidence, professional help pays for itself — and legal aid (aide juridictionnelle, means-tested state funding of litigation) is available to lawful residents who qualify. Beyond the trial court lie the Court of Appeal and, on points of law only, the Court of Cassation, whose PUMa rulings quoted above show how strictly the residence-proofs rule is policed and how little nationality matters to the outcome.
Three closing litigation points apply with particular force to British files. First, frame the case around the treatment date: the question is always what your position was on the day the care was given — working, holding a registered S1, or stably and lawfully resident for the requisite period — not what it became six months later. Second, use the fund’s own guidance against vague refusals: the service-public.fr English-language page on PUMa and the ameli.fr pages describe who is covered and how to apply (What is Universal Health Protection (PUMa)?, service-public.fr), so a refusal that contradicts the published criteria without explaining why must be challenged on its reasoning, not merely its result. Third, coordinate the tracks: a pending CRA appeal does not automatically suspend hospital recovery, so pair every appeal with a written request for a stay (demande de sursis à recouvrement) and, where recovery has started, consider an emergency application to the enforcement judge (juge de l’exécution, the judge who controls enforcement measures) rather than watching a bank attachment happen. Britons who were resident before 2021 should also keep their Withdrawal Agreement status in the bundle: lawful residence under the Agreement feeds directly into the “regular” limb of Article L160-1, and proving it with the Agreement card closes off the most frequently used refusal ground at a stroke.
Conclusion
French healthcare after Brexit rewards the Briton who chooses the right door early and punishes the one who drifts. Pensioners and UK-insured people should secure and register the S1 before care is needed; everyone else living in France should build the three-month residence file from arrival, keep lawful status watertight, and carry private cover across the gap; visitors should rely on the GHIC or EHIC and never mistake it for residence cover. Where the CPAM refuses or a hospital bill arrives, the method is the same in every case: diagnose the true ground, repair the file with dated objective proof, freeze recovery, lodge the compulsory CRA appeal within two months, and take a complete bundle to the social chamber of the tribunal judiciaire if the fund will not move. The statutes draw no distinction by nationality, the courts quote them verbatim, and a well-documented British file wins on exactly the same terms as a French one. What loses is delay, informality and the wrong door — all of which are avoidable from the day you arrive.
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Facing a CPAM refusal, an S1 that will not register, or a French hospital bill you cannot decode? Our office offers a telephone consultation within 48 hours with an avocat of the firm. Call +33 6 46 60 58 22 or write via our contact page. We advise British clients across France from our Paris office, including throughout Paris and the Île-de-France.