You have chest pain in Lyon at 11 pm, or your child wakes with a high fever in Dordogne, and the first question after calling for help is brutally practical: who pays, and will the French system even recognise you? Since Brexit, British citizens are third-country nationals in France. That single change reshaped everything about health cover. Before 2021, your European Health Insurance Card and your status as an EU citizen smoothed most problems away. Today, a British passport alone opens no door at the local health fund, the Caisse Primaire d’Assurance Maladie (CPAM, the local branch of French health insurance that registers residents and pays their claims). You join either because you live here in a stable and lawful way, because you work here, or because Britain remains responsible for you under a portable document called the S1 (a form issued by Britain confirming that the United Kingdom pays for your French healthcare).
This guide explains the three routes in plain English, with the exact French rules behind them. It is written for British residents, British pensioners retiring to France, British workers posted or remote working here, parents of British children at school in France, and British visitors who fall ill on holiday. Every French term is explained at first use. Every decisive statement is tied to the official text or to a published court decision you can open yourself. By the end you will know which desk to approach, which papers to bring, what a hospital bill means, and what to do within the strict two-month time limits when the CPAM (the local health fund) says no.
I. How do British residents join the French health system after Brexit: PUMA, carte vitale or S1?
A. PUMA and the carte vitale: the standard route for British residents living in France
For most British people who live in France year-round without a British S1, the answer is the PUMA (Protection Universelle Maladie, the universal residence-based health cover that replaced the old CMU for adults). The founding rule sits in the Social Security Code. Article L. 160-1 of that Code states, word for word: “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.” In ordinary English: anyone who works in France, or who lives here in a stable and lawful way without working, is covered for illness and maternity on the terms set by the Code. Nationality does not appear in that sentence, and that absence matters. A British retiree, a British spouse who does not work, or a British early retiree living off savings uses exactly the same doorway as a French inactive person, provided stability and lawfulness are proved.
Stability and lawfulness are two separate tests, and British applicants lose cases by confusing them. The Code sends both tests to regulatory detail. Article L. 111-2-3 of the Social Security Code says a Council of State decree sets how stability of residence and lawfulness of stay are assessed. The decree answer for stability is well known to advisers: Article R. 111-2 of the Social Security Code treats as stable anyone whose home or principal place of stay is in metropolitan France or the listed overseas territories, and it deems that condition met for most benefits after more than six months of actual personal presence in the calendar year, adding that “La résidence en France peut être prouvée par tout moyen.” That last phrase, which means residence in France may be proved by any means, helps British families who rent without French utility bills in their first months: tenancy agreement, school enrolment, bank statements, electricity contracts and travel records can combine to prove the home is really here.
In practice the CPAM (the local health fund) also applies a three-month rule at first registration, drawn from the older PUMA regulations. The Court of Cassation (Cour de cassation, the supreme court for civil and criminal matters) described it in a published Bulletin ruling of 3 June 2021, appeal number 20-10.687, available at https://www.courdecassation.fr/decision/60b8701b7418a41b2a7fcb51. The court recalled, word for word: “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.” In English: applicants for health cover may produce proof that they have lived in France without interruption for more than three months, or that they fall into one of the listed exemption categories. The same ruling holds that this scheme, which applies without distinction of nationality and pursues the management of an insurance system extended to the whole working and resident population, does not create unlawful discrimination. For a British family arriving in September, the message is concrete: keep every proof of arrival date, because the three-month clock often decides the start date of your rights.
Lawfulness, the second test, is where Brexit changed the daily life of British residents most. Since 1 January 2021, British citizens need a visa or residence permit to be lawful, unless they hold a Withdrawal Agreement residence card as protected residents. The CPAM applies the list set by the order of 10 May 2017 taken under Article R. 111-3: resident cards, multi-year cards, temporary cards, retiree cards, long-stay visas validated as residence permits, and receipts for renewal requests, among others. A vivid illustration comes from the Court of Appeal of Amiens (Cour d’appel d’Amiens, the regional appeal court), judgment of 18 April 2025, case number 24/00112, published on the official portal at https://www.courdecassation.fr/decision/680331a5168408c19df97e2d. A woman who arrived for family reunion asked for PUMA cover on 19 July 2022. The fund granted rights only from 13 September 2022, when it received her receipt for a residence-permit application. The court approved that start date and stated the governing principle, word for word: “pour bénéficier de la prise en charge de ses frais de santé, la personne doit justifier de son identité et de sa résidence stable et régulière, étant précisé que les conditions de stabilité et de régularité sont cumulatives et ne se confondent pas.” In English: to obtain cover, a person must prove identity plus stable and lawful residence, the two conditions being cumulative and distinct. It added, again word for word: “Il s’ensuit que c’est à bon droit que la caisse a ouvert les droits de Mme [J] à l’assurance maladie à compter du 13 septembre 2022, date à laquelle elle a eu connaissance de la régularité du séjour.” In English: the fund was right to open rights from 13 September 2022, the date it learned that the stay had become lawful. British readers should draw the operational lesson: apply early, but expect the effective date to follow the first lawful paper, not the date of arrival, and keep the récépissé (the official receipt given when a residence-permit application is lodged).
Once affiliated, you choose a médecin traitant (the nominated general practitioner who coordinates your care pathway, known as the parcours de soins). Registration is then materialised by the carte vitale (the green plastic health card with an electronic chip that surgeries and pharmacies swipe to trigger direct reimbursement). The card itself creates no new right, but without it every claim is paper-based and slower. Ask the surgery for a feuille de soins (the paper or electronic treatment statement) whenever the card cannot be used, and open an ameli account (the online portal of French health insurance) to track reimbursements. Children who do not work are covered as ayants droit (dependants registered through an insured parent). Article L. 160-2 of the Social Security Code gives that dependant status to minor children whose parentage is lawfully established, and lets a child from sixteen request personal cover. British parents should therefore register each child with the same CPAM file rather than assuming a British passport or an NHS record suffices.
What PUMA pays for is broad. Article L. 160-8 of the Social Security Code lists general and hospital consultant medicine, dental care, pharmacy, laboratory tests, hospitalisation and rehabilitation, transport for care, preventive acts and several other categories. Low-income households can add the complémentaire santé solidaire (the means-tested top-up cover that pays most or all of the part the state does not reimburse). Article L. 861-1 of the Social Security Code opens that top-up to persons mentioned in Article L. 160-1, free of charge below a ceiling set by decree and against a financial contribution up to 35 percent above that ceiling, with yearly indexation. British early retirees on modest budgets often overlook this second application, then struggle with the remaining share of dental or optical bills that the top-up would have absorbed.
B. S1, GHIC and EHIC: when Britain still pays for your French care
Not every British resident joins through PUMA. A large group stays under British financial responsibility through coordination rules preserved by the Withdrawal Agreement. The mechanism is the S1 (the portable form by which one state asks another to provide healthcare on its behalf). The French Code expressly steps aside in that situation. Article L. 160-6 of the Social Security Code excludes from Article L. 160-1, among others: “Les personnes titulaires d’une pension étrangère qui ne bénéficient pas par ailleurs d’un avantage viager d’un régime obligatoire de sécurité sociale français lorsque, en application d’un règlement européen ou d’un accord international, la prise en charge de leurs frais de santé ainsi que de ceux des membres de leur famille qui résident avec elles relève du régime étranger qui sert la pension”. In English: holders of a foreign pension who draw no French lifetime benefit are outside PUMA when a European regulation or international agreement assigns their health cover, and that of family members living with them, to the foreign state paying the pension. The same article sets aside diplomatic staff, people who came to France only for treatment, retired staff of international organisations with equivalent cover, posted workers exempted under coordination rules, and EU jobseekers. If you hold a British S1 as a state pensioner, a frontier worker or in some cases as the dependant of such a person, you do not ask the CPAM for PUMA. You register the S1 with the CPAM, which then provides French care on the same terms as for French insured persons while Britain reimburses France behind the scenes.
The British official guidance confirms the route. The GOV.UK page on healthcare for United Kingdom nationals living in France (see https://www.gov.uk/guidance/healthcare-in-france-including-martinique-and-guadaloupe) states that residents who draw a United Kingdom State Pension or an exportable benefit may be entitled to state healthcare paid for by the United Kingdom, that they must obtain an S1 and register it at the local CPAM office, and that they and their dependants will then be entitled to healthcare in France on the same basis as a French citizen, while still paying part of medical costs like other French residents. It adds that S1 holders also receive a United Kingdom-issued GHIC or EHIC for travel and can seek planned treatment in other EU countries through the notified route. For British pensioners in Dordogne, Brittany or Provence, that paragraph answers the most common question: yes, keep paying the French patient share and consider a mutuelle (the voluntary top-up insurance that covers most or all of the share the state leaves to patients), because an S1 does not make French care free.
Do not confuse the S1 with the GHIC or EHIC. The GHIC (Global Health Insurance Card, the post-Brexit card replacing the EHIC for most United Kingdom residents) and the EHIC (European Health Insurance Card) cover necessary state healthcare during temporary stays: holidays, short study periods, or travel as a posted worker. The NHS page on cover abroad (see https://www.nhs.uk/using-the-nhs/healthcare-abroad/apply-for-a-free-uk-global-health-insurance-card-ghic/) explains that the card gives access to necessary state care on the same basis as a resident of the visited country, free of charge, for up to five years. It does not cover residence. A British family that settles in France and keeps using a GHIC for two years is uninsured in the French sense and risks full invoices plus a gap in rights. Conversely, a British tourist who falls ill in Paris should show the GHIC at a conventionné provider (a doctor or clinic contracted with French health insurance at regulated fees) and will be treated under the French tariff, with the same patient share as a resident.
Three practical distinctions close this first part. First, posted workers sent temporarily by a British employer, and workers who remain under British legislation by agreement, stay outside PUMA under Article L. 160-6 while their posting lasts, and their family members living with them follow the same coordination logic. Remote workers employed by a British company while living permanently in France are different: once the home and centre of life move to France without a posting certificate, affiliation in France usually follows work or PUMA, and keeping only British payroll cover leaves a visible gap. Second, British students in France for a full academic year need residence-based cover or a valid student EHIC/GHIC for the temporary-study case, plus registration steps described in the student guidance, rather than reliance on a tourist card. Third, care received outside France follows its own rule: Article L. 160-7 of the Social Security Code provides that, subject to international conventions and European regulations, benefits are not paid when treatment is given outside France, with decree-based exceptions for sudden illness during a stay abroad or treatment unavailable in France. British residents who keep a second home in Kent and cross the Channel for planned NHS treatment should therefore organise an S2 or equivalent planned-care route in advance, rather than assuming the CPAM will reimburse a London invoice after the event.
The official French starting points for all of this are the Service-Public page on the PUMA (see https://www.service-public.fr/particuliers/vosdroits/F34308), which points applicants to their CPAM, and the ameli portal pages on universal cover and on opening rights after return from abroad. Read those pages before you queue at the counter: they list the current forms, the proof of address accepted, and the translation requirements for birth and marriage certificates that British applicants most often miss.
II. What do you actually pay in a French hospital or surgery, and how do you challenge a refusal or a bill?
A. Hospital bills, surgery fees and the part you still pay: ticket modérateur, forfait and mutuelle
French state healthcare is generous but never entirely free for adults, and British newcomers who expect an NHS-style zero bill are caught out by the first hospital invoice. The system works by tariffs and shares. The health insurance fund pays its share of a regulated tariff, and the patient pays the rest. That rest has several layers, each with its own French name that you will see on bills.
The largest layer is the ticket modérateur (the statutory share of the tariff left to the patient, literally the moderating share). Article L. 160-13 of the Social Security Code organises that patient share: it can be proportional to the tariff or set as a flat sum, vary by category of treatment, care setting and type of hospital, and be reduced by age or family situation, within limits set by Council of State decree and decisions of the national union of health insurance funds. The same article adds two further flat charges that appear on almost every British patient’s statement: a fixed participation for each act or consultation with a doctor in the community, in a facility or in a health centre, excluding acts during hospitalisation, and also for laboratory acts, which cumulates with the proportional share; and an annual franchise (a yearly deductible) on medicines dispensed outside hospital, on acts by allied health professionals outside hospital, on non-urgent road transport by medical vehicle or taxi, and on defined pharmacy services, capped by an annual ceiling. The article also sets a flat charge for an unplanned visit to an authorised emergency department that is not followed by hospitalisation. In daily life, that means a British resident who visits a general practitioner, collects antibiotics and orders blood tests in the same week can lawfully see three small flat deductions plus the proportional share on each tariff, even before any hospital stay.
Hospitals add their own flat amounts. The forfait hospitalier (the daily hospital flat fee for accommodation and catering) and the emergency flat charge sit beside the ticket modérateur on the invoice. Long stays, private rooms and sector 2 surcharges (fees charged above the regulated tariff by doctors authorised to exceed it, known as dépassements d’honoraires) inflate the total further. A British patient should therefore read a French hospital bill in three columns: what the fund paid, what the mutuelle may reclaim, and what remains due. Ask the admissions office, the bureau des entrées (the hospital admissions and billing desk), whether the doctors are secteur 1 (contracted at regulated fees without surcharge) or secteur 2, whether the estimate includes the daily flat fee, and whether tiers payant (the direct-payment arrangement where the patient does not advance the covered share) applies. Keep the avis des sommes à payer (the formal notice of sums due issued for public hospital debts) and every feuille de soins, because limitation periods and challenges run from documented notification, not from a phone call.
Three tools reduce the burden lawfully. First, the parcours de soins coordinated around the médecin traitant: consulting outside that pathway without a valid reason lowers reimbursement. Declare the nominated doctor promptly after affiliation, and ask for an ordonnance (the written prescription) for each referral, test and transport. Second, the mutuelle: for British pensioners with an S1 and for working residents alike, a modest monthly policy often wipes out the ticket modérateur, the daily flat fee and much of the optical and dental remainder. Compare whether the policy covers dépassements, the daily fee and the emergency flat charge, and whether it imposes waiting periods. Third, the complémentaire santé solidaire for low incomes under Article L. 861-1, and the aide médicale d’urgence for persons without lawful residence who face urgent care needs, each with its own counter and forms. Do not let pride delay the means-tested application: the CPAM back-offices see British early retirees every week whose savings look comfortable in sterling but whose taxable income in France falls below the ceiling.
Families should organise paperwork before illness strikes. Register every child as ayant droit, declare the médecin traitant for each child old enough to need one, photograph both sides of each carte vitale, store the ameli login, and keep a folder with passports, visas or residence cards, birth certificates with sworn translation where requested, proof of address less than three months old, employment contracts or S1 forms, and school certificates. When a hospital asks for an attestation de droits (the certificate of current health-insurance rights downloadable from ameli), produce it the same day. Hospitals in tourist areas know the GHIC well; smaller clinics sometimes do not, so carry the physical card plus a copy and point to the conventionné tariff rather than accepting a private-tariff invoice without question.
B. CPAM refusal, delayed carte vitale or wrong bill: how to challenge step by step from Paris to Marseille
Refusals follow patterns, and British files stumble on the same four points: alleged lack of stability, alleged lack of lawfulness, alleged overlap with British cover, and missing papers. The CPAM may refuse PUMA because it counts fewer than three or six months of presence, because the visa was a short-stay Schengen stamp rather than a long-stay visa, because the récépissé had expired on the day the file was examined, because an S1 was assumed to still cover you, or because a birth certificate lacked an apostille or sworn translation. A hospital may separately bill the full tariff because the carte vitale had not yet arrived or because the admission team coded you as non-affiliated. Each path has its own remedy, and the clock matters more than the tone of your letter.
Start with the paper trail on the day of the refusal. Ask for the written notification with its date, reference and legal basis, and check which test it invokes: stability, lawfulness, or competing foreign cover. Complete the file rather than arguing the principle first. For stability, add dated proof of continuous home in France and cite the rule that residence may be proved by any means. For lawfulness, add the current residence permit, the Withdrawal Agreement card, the validated long-stay visa, or the latest récépissé, and recall that the Amiens court treated stability and lawfulness as cumulative but distinct, so winning one test does not excuse losing the other. For competing cover, clarify whether a British S1 is active, suspended or closed: if you draw a United Kingdom pension and hold an S1, PUMA is closed by Article L. 160-6 and the remedy is to register the S1, not to insist on PUMA. If no S1 exists and no French occupational benefit exists, PUMA remains the correct door. For hospital overbilling, ask the bureau des entrées for an itemised invoice, the coding of each act, the sector of each doctor, and a corrected claim to the CPAM once rights are open, including retroactive opening where the regulations allow it for recent hospitalisation combined with a simultaneous top-up application.
The first formal challenge is the recours préalable (the mandatory prior appeal to the fund itself). Article L. 142-4 of the Social Security Code requires that contentious appeals in the listed social-security matters be preceded by a prior appeal under conditions set by Council of State decree. Article R. 142-1 of the Social Security Code sends claims against decisions of health insurance funds to a commission de recours amiable (the amicable appeals board inside each fund, usually called the CRA), and states, word for word: “Cette commission doit être saisie dans le délai de deux mois à compter de la notification de la décision contre laquelle les intéressés entendent former une réclamation.” In English: the board must be seised within two months from notification of the contested decision. Missing that two-month window is the most common fatal error in British files. Send the CRA letter by tracked means, attach the refusal, number each enclosure, state whether you seek affiliation from a specific date, reimbursement of specific treatment statements, or correction of a bill, and keep proof of posting. If the fund does not answer within two months, that silence can be treated as an implied rejection that opens the next stage, but diary the date rather than waiting indefinitely.
The second stage is the tribunal judiciaire (the ordinary civil court, whose social division hears health-insurance disputes). File within two months of the CRA decision, express or implied, with the refusal, the CRA referral and its outcome, identity and residence proof, the S1 position if any, and the medical invoices in dispute. Ask the registry to confirm the competent territorial court, normally where you live or where the fund sits. In Paris and the inner suburbs, that means the Paris judicial court social division for residents of the capital, with the CPAM de Paris (the Paris health fund, which handles very large numbers of foreign-national files) as the opposing body; practical delays there are longer, so file complete bundles and answer the reporting judge promptly. In Île-de-France more broadly, allow extra time for summonses, keep French translations ready, and attend hearings with photo identification matching the CPAM file. Judges apply the same national tests illustrated by the Amiens case: identity proved, stability proved by any means, lawfulness proved by a listed title valid on the application date, and start date aligned with knowledge of lawfulness rather than bare arrival. Bring the récépissé timeline highlighted above, because courts count lawful days from papers, not from memory.
Urgent treatment needs a parallel track, not a substitute for the appeal. If care cannot wait, seek treatment first, keep every prescription and invoice, and ask the hospital social service, the service social hospitalier (the hospital team that helps patients with cover and payment plans), to open rights, request the attestation de droits, or arrange instalments while the CRA case runs. For emergency hospital debts pursued by the public accountant, check the nature of the enforcement document, the notification date, and the available challenge before the competent judge, and do not ignore an avis des sommes à payer. For repeated CPAM silence on a carte vitale after rights are granted, escalate through the ameli messaging system, then the conciliator or médiateur (the fund ombudsman), then the CRA if a formal decision exists, keeping each reference number in one chronological table.
British visitors who receive a French hospital bill after a holiday follow a shorter checklist. If you showed a valid GHIC or EHIC for necessary care during a temporary stay, the hospital should bill through the coordination channel at the French tariff, leaving only the normal patient share. If you were billed as a private patient, ask for re-coding, keep the emergency report, and claim through the NHS overseas route with the itemised invoice and proof of temporary stay. If you had already moved your home to France when the treatment occurred, do not rely on the visitor card afterwards: register for PUMA or register the S1, then ask whether retroactive opening covers the treatment dates under the narrow conditions the funds apply.
Conclusion
British healthcare in France after Brexit rests on three clear questions. Do you live here in a stable and lawful way, proved by any means for the home test and by a listed visa, residence card or receipt for the lawful test? Does Britain remain responsible for you through an S1 that must be registered rather than kept in a drawer? And for each bill, which share is statutory, which is a flat charge, and which should fall to a mutuelle or a means-tested top-up? The PUMA doorway under Article L. 160-1 welcomes British residents who meet both residence tests. The S1 doorway under Article L. 160-6 serves British pensioners and other coordinated cases where Britain pays. The GHIC doorway serves temporary stays only. The decided cases give the method: prove continuous presence from day one, align the effective date with the first lawful paper as the Amiens court did, respect the two-month CRA deadline under Articles L. 142-4 and R. 142-1, and take the dispute to the judicial court with a complete, dated bundle. Organise the folder before illness strikes, declare a médecin traitant, carry the carte vitale or the S1 attestation, and read every hospital invoice in its three columns. That discipline turns an anxious night in a French emergency department into an administered file with a predictable outcome.
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