Since 1 January 2021, British citizens living in France have been third-country nationals. That single fact reshaped their healthcare: the European Health Insurance Card logic of free movement no longer covers them, a British passport no longer opens the door of the local health insurance fund on its own, and every British resident must fit into one of two precisely defined doors — the British-funded S1 route or the French residence-based PUMA route. Those who pick the wrong door, file late, or arrive with the wrong card face the same shock: a refusal letter from the CPAM (caisse primaire d’assurance maladie, the local fund that manages health cover), a hospital bill to pay out of pocket, and months without a carte Vitale (the green smart card that triggers reimbursement). This article explains both routes in full, shows how the funds decide, and sets out exactly how to challenge a refusal, whether you live in Paris, elsewhere in Ile-de-France, or in the provinces — and even if you have already moved back to the United Kingdom.
French readers meet many of these terms for the first time here, so each one is explained as it appears: CPAM, PUMA (protection universelle maladie, the universal cover for stable and lawful residents), S1 (the portable document by which the United Kingdom pays France for your treatment), carte Vitale, and CRA (commission de recours amiable, the fund’s internal appeals board). The analysis below rests on the Code de la sécurité sociale as in force, the foreigners code for the private-insurance cases, recent social-chamber case law, and the current official guidance on both sides of the Channel.
I. How a British resident gets covered: the UK-funded S1 route and the French PUMA route
A. The S1 certificate: British pensioners, frontier workers and posted staff treated in France on London’s account
The S1 is the document by which one state asks another to treat a person as if insured locally, while footing the bill itself. For British residents of France it is the heir of the old European coordination, preserved after Brexit by the Withdrawal Agreement for persons already within its scope and by the Trade and Cooperation Agreement for new situations. The British government’s own guidance states the core of it plainly: British residents who draw a UK State Pension or a qualifying exportable benefit can have their French state healthcare funded by the United Kingdom Pensioners form the largest group, but frontier workers — people who work in one state and live in the other — and posted (detached) workers sent temporarily by a British employer can also qualify, subject in each case to confirmation by HMRC’s National Insurance unit.
Practical consequences follow directly. An S1 holder does not join the French system as an ordinary resident; the holder registers the form with the local CPAM, which then issues rights and, in time, a carte Vitale, while the cost is recharged to the United Kingdom. That is why French law expressly carves these pensioners out of the residence-based scheme: article L. 160-6 of the Code de la sécurité sociale provides that article L. 160-1 does not apply, among others, to persons drawing a foreign pension who do not also receive a French benefit, where European rules or an international agreement assign their care to the pension-paying state. In plain terms, a British retiree holding an S1 is covered in France but remains financially attached to the British side — which also means France cannot charge that retiree the residence-based health contribution described below.
Three frequent mistakes must be avoided. First, the GHIC (global health insurance card, the British successor of the EHIC for temporary stays) is not residence cover: as the same official guidance warns, a UK-issued EHIC cannot be used by a person who lives and works in France under a French contract Tourists and posted staff may rely on it; residents may not. Second, posted workers need their paperwork in order before treatment: the A1 certificate proving British National Insurance coverage, plus the S1 or GHIC, registered as instructed by the CPAM. Third, students fall under their own headings of the guidance and should check the studying section rather than assume either adult route applies automatically. Anyone who draws a British State Pension while living in France should therefore ask HMRC for an S1 first and register it with the CPAM before assuming any French residence-based right — because once the S1 route applies, it takes precedence over the PUMA route examined next.
B. The PUMA: stable and lawful residence, three months of proof, and the CPAM file that decides everything
Everyone else — employees of French businesses, self-employed residents, early retirees without an S1, inactive British residents living on savings — depends on the PUMA, the universal protection created for people who reside in France on a stable and lawful basis. Its founding sentence is worth quoting in full, because every refusal letter is measured against it: “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.” Two adjectives carry the whole weight: stable and lawful (régulière, meaning residence compliant with immigration law). The assessment rules sit in article L. 111-2-3, which sends the detail to regulation, and the regulations draw three sharp lines.
Stability first. Article R. 111-2 treats as stable residents persons whose home or principal place of stay is in metropolitan France or certain overseas territories — a factual test of where life is actually centred, proved by tax notices, utility bills, rent receipts and school certificates. Lawfulness second. Article R. 111-3 reserves the benefits to French nationals and to foreigners in a lawful position under stay legislation, who moreover do not already belong to another state’s scheme under European rules or international agreements. For a British citizen after Brexit, that sentence is decisive: without a valid Withdrawal Agreement card, long-stay visa, residence permit or lawful visa-free presence, the PUMA door stays shut, however long the person has rented a house in the Dordogne. Third, newcomers without any professional activity apply through a dedicated declaration: a newcomer who files the declaration with the local fund is covered as soon as identity plus stable and lawful residence are shown Identity plus stable and lawful residence: that is the whole file in principle, though in practice the fund asks for far more paper.
That practice centres on the three-month rule. Article D. 160-2 requires applicants under article L. 160-5 to produce evidence of uninterrupted residence in France for more than three months: “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 doivent produire un justificatif démontrant qu’elles résident en France de manière ininterrompue depuis plus de trois mois”. Acceptable proof ranges from benefit statements to housing and tax documents, and British newcomers should assemble a dated chain covering every week, because a gap of even a few days is routinely used to restart the clock. Once affiliated, the cover itself is broad: article L. 160-8 lists general and specialist medicine, dental care and prostheses, pharmacy, laboratory tests, hospitalisation, rehabilitation and related treatment. The standard French mechanics then apply — a declared médecin traitant (usual GP who coordinates the care pathway), roughly 70 per cent reimbursement of the regulated tariff for most care with the patient funding the balance directly or through a mutuelle (supplementary private insurer), and exposure to dépassements d’honoraires (fees charged above the regulated tariff) where the practitioner is authorised to set them.
Money matters overlay this picture twice. Inactive residents with low professional income may owe the cotisation subsidiaire maladie (the annual contribution levied on PUMA members outside work): article L. 380-2 makes persons covered by article L. 160-1 liable where their French professional income sits below a decreed threshold and they received no pension, annuity or unemployment benefit during the year — conditions assessed at couple level for married and PACS partners. Early-retired Britons living on capital should therefore budget for this charge rather than discover it on a tax notice. At the other end of the scale, low-income households can claim the complémentaire santé solidaire (the free or low-cost top-up cover): article L. 861-1 grants it to persons covered by article L. 160-1 below a decreed resource ceiling, with a modest financial participation for those between that ceiling and the ceiling plus 35 per cent. Finally, protection does not vanish overnight when work ends: article L. 161-8 maintains cash benefits for those who stop meeting the activity condition while still meeting residence and stay conditions. Registration itself follows the British government’s pointer — applications for PUMA go through the local CPAM office — with the same page warning that a provisional social security number normally arrives by post one to three months after registration The carte Vitale itself takes longer still, and until it arrives every consultation is paid upfront and reclaimed on paper — which is why the start date of rights, examined next, is worth real money.
II. When the CPAM says no: refusals, hospital bills and how to challenge from France or the United Kingdom
A. The refusals British residents actually receive: start dates, visiteur private insurance, and the Paris and Ile-de-France practicalities
The most expensive refusal is not a flat no but a late yes. Funds regularly open rights only from the date the file is deemed complete — often the date they receive the récépissé de demande de carte de séjour (the receipt issued when a residence-permit application is lodged) — leaving months of treatment, sometimes a hospital stay, outside cover. The Court of Appeal of Amiens confirmed the mechanism on 18 April 2025 in a PUMA start-date dispute (RG 24/00112, judgment available on the official judicial database at courdecassation.fr): a woman who had arrived in France in June 2022 and requested cover in July obtained rights only from 13 September 2022, when the fund received her permit-application receipt, and the fund then rejected her request for backdating. The court rehearsed the founding text — “Aux termes de l’article L. 160-1 du code de la sécurité sociale, 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” — tied the regularity condition to the documented permit step, and ended with a dry outcome: “Déboute Mme [T] [J] de sa demande tendant à l’ouverture rétroactive de ses droits à l’assurance maladie au 19 juillet 2022”. British readers should draw three lessons. File the PUMA request the week of arrival even if the file is incomplete, because the paper trail of early filing is the only weapon later. Chase the récépissé from the préfecture (the local state authority handling permits) as the single most valuable document in the health file. And frame any later appeal as a precise demand about the start date with dated proof for every week, not as a general complaint about hospital invoices — in that same judgment the court stressed that “L’objet du litige porte donc exclusivement sur le point de départ d’ouverture des droits” and set aside the first-instance ruling precisely because the lower court had ordered an invoice paid instead of deciding the start-date question put to it.
The second classic refusal hits British holders of a visiteur residence card — typically retirees who proved self-sufficiency to obtain their visa. Article L. 426-20 of the foreigners code states that the self-supporting foreigner receives a one-year visiteur card and that “Il doit en outre justifier de la possession d’une assurance maladie couvrant la durée de son séjour et prendre l’engagement de n’exercer en France aucune activité professionnelle.” Relying on that undertaking, funds routinely refuse PUMA membership to visiteur holders and tell them to claim on their private insurance instead. The trap is real: the private policy that satisfied the consulate often caps payouts, excludes pre-existing conditions, or refuses direct settlement with French hospitals, leaving the retiree to advance thousands of euros. Anyone choosing the visiteur path should therefore buy insurance that genuinely covers French hospital tariffs for the full year, keep the certificate, and budget for the possibility of litigating the articulation between the insurance undertaking and the residence-based right — an argument that turns on individual facts and requires advice before the fund’s deadline expires.
Paris and Ile-de-France add their own layer of practical difficulty. The CPAM de Paris handles an enormous foreign caseload, appointments and document requests move slowly, and English-language support remains patchy despite the ameli English pages that explain registration steps. Postal delays in the capital mean the one-to-three-month wait for a provisional number frequently stretches further, and hospitals in the AP-HP network bill aggressively while cover is pending. On the litigation side, venue is straightforward: disputes belong to the pôle social (social chamber) of the judicial court of the insured’s home — the Tribunal judiciaire de Paris for the capital — with appeal to the Paris Court of Appeal, as illustrated by the Lille-to-Douai/Amiens path in the 2025 case. British residents who have already returned to the United Kingdom are not without remedy either: time limits run from notification of the decision wherever they live, correspondence with the fund and the appeals board can be conducted by post and online, and representation by a Paris avocat before the competent court requires no physical presence at every step. The decisive factor is always the same — acting within the time limit with a complete dated file — which is the subject of the final section.
B. Challenging the decision: the internal appeal, the social chamber, and the evidence that wins
Every CPAM refusal must state the remedies, and the first is compulsory: the CRA of the fund that decided. The Amiens judgment recalls the framework in terms every British appellant should memorise — claims against fund decisions go to an internal appeals board, that board must be seized within two months of notification, and more generally “s’il n’en est disposé autrement, le délai de recours préalable et le délai de recours contentieux sont de deux mois à compter de la notification de la décision contestée”. Two months for the internal appeal, then two months for the court appeal if the board rejects or stays silent: missing either deadline ends the case whatever its merits. The CRA letter should therefore be sent by tracked post or deposited against receipt within days, identify the exact decision by date and reference, state precisely what is asked — opening of rights, a specific start date, reimbursement of a named invoice — and attach the full dated file rather than promises of documents to come.
The file that wins has the same five blocks in every case. Identity and nationality: passport, birth certificate, and for good measure the British driving licence or national insurance letter showing the move is genuine. Lawful presence: Withdrawal Agreement card or long-stay visa plus passport stamps, the permit-application récépissé with its date, and any préfecture correspondence proving continuity of status — the Amiens case shows the récépissé date can become the rights date, so its absence costs money directly. Stability week by week: lease or title deeds, electricity and telephone bills, French tax notices, children’s school certificates, bank statements showing daily life in France, arranged as an unbroken chain covering the three months before the application and everything since. Non-membership of another scheme: the S1 position clarified (applied for, refused with reasons, or held and registered), HMRC letters on pension and benefit status, and any A1 certificate for posted workers. And the medical-financial loss: hospital invoices, pharmacy receipts, proof of upfront payment, and the private insurer’s refusal or cap letter where a visiteur policy is in play. Each block answers one statutory condition, and the covering letter should map each document to the condition it proves, because the board rapporteur decides on papers and rewards clarity.
If the board rejects the claim, the dispute moves to the pôle social of the judicial court, where procedure is written, representation by counsel is strongly advisable for appellants living abroad, and the court’s review covers both the facts and the law — including, where relevant, European coordination and the Withdrawal Agreement. Two strategic warnings from the 2025 case law deserve emphasis. Define the object of the dispute exactly: ask the court for the start date with reasons, or for reimbursement of specified invoices, but do not mix both vaguely, since a court that grants something outside the claim risks reversal on appeal. And never let parallel tracks drift: a pending préfecture permit renewal, a GHIC reimbursement claim in the United Kingdom, and the French court case must tell the same story about residence dates, because inconsistent dates across files destroy credibility. British residents who receive a refusal while already back in the United Kingdom should instruct promptly, diarize both two-month limits from the notification date shown on the letter, and preserve every envelope. Handled this way, a CPAM refusal is the beginning of a structured dispute with real prospects — not the last word.
Conclusion
Healthcare is the first promise a British move to France must keep, and after Brexit it keeps itself through paperwork, not passports. Pensioners and qualifying workers should secure the S1 and register it with the CPAM before relying on any French right; everyone else should build the PUMA file from week one — lawful status, unbroken three-month proof, dated chain of daily life — and treat the permit receipt as the most valuable page in it. Where the fund refuses or backdates unfairly, the two-month internal appeal followed by the social chamber offers a genuine remedy, as the 2025 start-date litigation demonstrates, provided the demand is precise and the evidence is complete. The system is demanding but legible: meet each statutory condition with paper, meet each deadline with days to spare, and the cover follows. Readers who recognise their own situation in these pages — a pending CPAM file, a refused start date, a visiteur insurance gap, or a hospital bill paid from savings — should have the file reviewed before the next deadline runs.