Getting a French social security number as a foreigner

This trips up almost every new arrival. Having a French social security number does not by itself mean your medical bills are reimbursed. The government page on the difference, verified 13 March 2026, separates identification, which is the allocation of the unique number (the NIR), from affiliation, which is being attached to a scheme that actually pays: service-public.gouv.fr/particuliers/vosdroits/F225.

In practice the two arrive together for most people moving to France, because the same CPAM file does both. But if you are told your number has been issued and your pharmacy still charges you in full, that gap is the reason. What you need in a pharmacy or a doctor's surgery is proof of open rights, not a number on a letter.

The number is 13 digits plus a two-digit control key, and it is readable. The official explainer, verified 19 August 2025, breaks it down: the first digit is sex (1 for male, 2 for female), digits two and three are the year of birth, digits four and five the month, digits six to ten the place of birth, and digits eleven to thirteen an order number distinguishing people born in the same place in the same period: service-public.gouv.fr/particuliers/vosdroits/F33078.

For anyone born outside France, the same page states that the two-digit department code is replaced by 99 and the commune code by an INSEE code for the country of birth. So an American or British applicant's number carries 99 in the middle. That is normal and permanent, not a sign of a provisional record.

If you are arriving to work, the number question runs through your employer. The government page on Social Security registration for an employee arriving in France, verified 8 March 2022, says you provide your employer with either your social security number or your numéro identifiant d'attente so the employer can complete the formalities. The competent body is the CPAM for the general scheme, or the MSA for agricultural work: service-public.gouv.fr/particuliers/vosdroits/F16467.

The rights side is faster than most people expect. The protection universelle maladie page, verified 13 May 2026, states that a person carrying out professional activity in France whose PUMa application is accepted is affiliated immédiatement: service-public.gouv.fr/particuliers/vosdroits/F34308. The wait you have read about elsewhere belongs to the other route.

If nobody in the household is working, affiliation runs on residence. The same PUMa page sets two conditions, regularity and stability of residence, and states under the no-professional-activity branch that "une fois en France, vous devez attendre 3 mois avant de voir vos droits ouverts": once in France you must wait three months before your rights open. Rights then stay open if you live in France at least six months of the year. Some categories, including refugees and people returning from international volunteering, meet the stability condition without that delay.

The application goes to the CPAM using the official request to open health insurance rights (online service reference R45084 on that page). Non-European nationals must additionally show the regularity of their stay. The government page on that point, verified 13 March 2026, accepts residence cards, long-stay visas processed through the OFII and equivalent documents: service-public.gouv.fr/particuliers/vosdroits/F13842.

One live change to watch. The PUMa page, verified 13 May 2026, carries a notice that the law of 30 December 2025 financing Social Security for 2026 provides for a financial participation from PUMa beneficiaries who meet three conditions, and that a décret setting the amount is awaited. No amount and no effective date were published on that page at its verification date. Check it again before you rely on it.

The registration page for arriving employees, verified 8 March 2022, names the core two documents, and they are the same two that hold most files up:

• An identity or residence document allowing you to be identified, meaning your passport with your long-stay visa or your residence permit.
• A civil status document confirming your identity, for example a full copy of your birth certificate.

The birth certificate must be translated into French unless it comes from a country of the European Economic Area or Switzerland, or unless an international agreement exempts you. The page also states that if only your identity or residence document initially meets the requirements, you have three months to produce the missing civil status document.

Practical reading of that: order a long-form birth certificate before you leave, not after you arrive, and budget for a sworn translation. This is the single most common reason a French registration file sits still.

The sequence has three steps and people often confuse them. First, where your documents give sufficient guarantees of authenticity, the fund issues a numéro identifiant d'attente and forwards your file to the national old-age insurance fund. Second, that body decides, after checking the documents, on the allocation of your social security number. Both steps are on service-public.gouv.fr/particuliers/vosdroits/F16467, verified 8 March 2022.

Third, the carte Vitale. The official card page, verified 18 November 2025, says the card can be requested through your ameli account or by returning the paper form, and gives two weeks from an online request and about three weeks by post. While you wait you can obtain an attestation de droits, which is the document that proves your entitlement: service-public.gouv.fr/particuliers/vosdroits/F265.

For a rougher end-to-end expectation, FCDO guidance for UK nationals says a temporary social security number arrives by post one to three months after registering and that a carte Vitale can take six months or longer. That page was last updated 25 July 2022, so use it as an order of magnitude and not as a promise: gov.uk/guidance/healthcare-in-france.

Until your rights are open and you can prove it, you pay French medical bills yourself. The tariffs are moderate by American standards and unpleasant by British ones: a secteur 1 GP consultation is set at €30 on the official reimbursement page verified 22 December 2024, and an unplanned hospital admission is on a different scale entirely.

That window is what private international cover is bought for. It typically handles consultations, prescriptions and hospital treatment during the period before public entitlement is live, on the benefit terms written in the policy schedule rather than as a copy of what Assurance Maladie would eventually have paid. It is designed to sit in front of a pending public entitlement, not to substitute for registering.

Two things to check in the wording. How the plan treats the handover once your French rights open, so you are not paying for two things that overlap for months. And how pre-existing conditions are handled, which is the most common reason a claim in this window is declined. Benefits follow the policy wording; premiums are quote-based.