Introduction

You've just arrived in France and everyone is asking for your "social security number": the university's health insurance, your student job employer, the CAF, the doctor you're seeing for the first time. You rummage through your papers and find nothing — or you have a number that starts with 7 or 8 instead of the classic 1 or 2. Don't panic: it's a NIA, a provisional number, and this is exactly what happens to newcomers.

The confusion between NIA, NIR, Ameli ID, and Carte Vitale costs thousands of new residents weeks every year. Without a functional number, there are no medical reimbursements, no properly declared salary, no access to the CAF, and no supplementary health insurance. Here’s the practical guide for 2026, updated with real timelines and new CPAM requirements.

NIA vs NIR: the difference to understand

• The NIR (Registration Number in the Directory) is the permanent social security number, consisting of 13 digits + 2 key digits. It starts with 1 (male) or 2 (female), followed by the year and month of birth, and then a department/INSEE code of birth. You keep it for life.
• The NIA (Identification Number Pending) is a provisional number assigned by the CPAM while waiting for the INSEE to validate your identity with your foreign birth certificate. It starts with 7 or 8 and works like a real NIR for most procedures: reimbursements, pay slips, CAF, Ameli.

To remember: a NIA is not a "discounted" number. It allows you to:

• Receive reimbursements from the CPAM
• Be registered by your employer on their social declarations (DSN)
• Open an online Ameli account
• Apply for complementary health insurance (CSS) or subscribe to a mutual
• Apply for AME (State Medical Aid) — no, AME does not use the NIA, but that's a different application
• Apply for CAF (APL, RSA, back-to-school allowance...)

The only thing the NIA does not allow: ordering a Carte Vitale. For that, you need the permanent NIR. Between the assignment of the NIA and that of the NIR, it takes an average of 2 to 6 months in 2026, with peaks of up to 9 months in Île-de-France.

How to obtain a NIA upon arrival

Three entry points depending on your status:

1. You are an employee

This is the fastest route. Your employer automatically registers you during the first Social Declaration Nominative (DSN). You generally receive a NIA within 2 to 6 weeks after your first paycheck. Check with your HR department that they have submitted your translated birth certificate + passport + residence permit or receipt.

2. You are a student

Since 2018, affiliation is automatic for French and European students, but for non-EU foreigners, you need to register at etudiant-etranger.ameli.fr (dedicated portal). You create an account with your passport, your university enrollment certificate, your translated birth certificate, and a bank account statement (RIB). The NIA is issued within 4 to 12 weeks. Until you have it, you pay for your consultations upfront; reimbursement is retroactive from the date of issuance.

3. You are inactive, a spouse, or a self-employed person

You need to make an appointment at your local CPAM (via Ameli account or in person) and submit a "first affiliation" file. Required documents: S1106 form ("request for opening rights to health insurance"), passport, residence permit, translated birth certificate, proof of residence, and — critical point — proof of stable residence (minimum 3 months under PUMa criteria, Universal Health Protection). Timeline: 2 to 6 months.

Concrete cases observed in 2026:

• Chen, a Chinese engineer who arrived in Lyon with a Talent Passport in March 2026, employed by a large group: NIA received on his pay slip for May 2026 (2 months). Permanent NIR and invitation to order the Carte Vitale in August 2026 (5 months).
• Houria, an Algerian PhD student in Lille, doctoral contract signed in September 2025: NIA received in October, NIR in March 2026, Carte Vitale in April.
• Carla, Brazilian, spouse of a French national who returned home after years in Brazil, unemployed: file submitted in January 2026, NIA in May 2026 (4 months), NIR still pending in September.
• Tuan, a Vietnamese student in Toulouse, master's in engineering: file submitted on etudiant-etranger.ameli.fr on September 15, 2025, NIA received on December 8 (12 weeks).
• Mamadou, Senegalese, self-employed delivery person since February 2026: he went through URSSAF then CPAM, NIA in July (5 months — delayed due to the translation of the birth certificate).

Documents to have ready

The CPAM systematically requests:

• Passport (identity page + visa or residence permit)
• Valid residence permit or receipt
• Full birth certificate, translated into French by a sworn translator or multilingual (European multilingual) if issued by certain countries. Multilingual certificates from countries that are signatories to the CIEC Convention No. 16 (most European countries) are accepted without translation. For China, Morocco, Algeria, Senegal, Vietnam, Brazil: translation is mandatory (50 to 80 € per document, expect 5 to 10 days)
• Translated marriage certificate, if applicable
• Proof of residence less than 3 months old (EDF/internet bill, accommodation certificate)
• French bank account statement (a Nickel or N26 account works)
• S1106 or S1107 form depending on your situation
• For students: university enrollment certificate for the current year

Practical advice on translation: the birth certificates that cause the most problems are Chinese certificates (often written too briefly by local civil registry offices), and Malian, Senegalese, Congolese certificates that may require additional legalization by the French consulate of the country of origin. Anticipate 1 to 3 months to obtain them even before your departure.

Why the NIA is essential

Without a social security number (provisional or permanent), you are blocked from:

• Hiring: your employer cannot declare you correctly to URSSAF, so certain contracts cannot start (especially in temporary work and paid internships)
• Medical reimbursements: you pay 30 € for a general practitioner consultation, 80–250 € for a specialist consultation, full price for medications. No retroactivity sometimes if > 1 year delay
• CAF: no APL, activity bonus, or housing allowance without a validated NIA
• Mutual/complementary health insurance: most mutuals refuse membership without a social security number
• CSS (Complementary Solidarity Health): impossible to apply, so you do not benefit from full third-party payment even if you are eligible
• Student or consumer loans: some banks require the social security number in addition to the residence permit
• Retirement: without contributions correctly recorded on your permanent NIR, your working quarters in France do not count

A typical concrete case: Linh, a Vietnamese intern earning 800 €/month for 6 months, did not receive a social security number before the end of her internship. Result: no reimbursement for medical care (340 € she could have been reimbursed), no retirement contributions recorded, and a CAF application rejected along the way. With a NIA from month 1, she would have saved 600 € and 4 months of stress.

The Carte Vitale: next step

Once the permanent NIR is assigned (the number without 7 or 8 at the beginning), Ameli sends you an invitation by email or mail to order the Carte Vitale. Since 2024, the order can be made:

• On the Carte Vitale app (smartphone, France ConnectID or Ameli identity) — dematerialized version, works with equipped doctors
• On ameli.fr → "My procedures" → "Order my Carte Vitale" — plastic version received within 2 to 4 weeks
• At CPAM agency with an appointment

Required documents: compliant identity photo (e-photo) + digitized identity document. The card is free (first copy) and expires upon your departure or death.

In summary

• NIA = provisional number starting with 7 or 8; NIR = permanent
• The NIA works for everything except the Carte Vitale
• Timeline for obtaining: 2 to 6 months depending on the channel (employer > student > inactive)
• Key documents: translated birth certificate, residence permit, proof of residence, RIB
• Without NIA: no medical reimbursement, no CAF, no mutual
• Carte Vitale: orderable only with the permanent NIR

On Pionra

On Pionra, the communities Chinese, Moroccan, and Algerian share their trusted sworn translators for birth certificates, real timelines by CPAM (Bobigny, Lyon, Marseille…) and tips for following up on a pending file. The Vietnamese, Senegalese, Portuguese, and Brazilian communities have dedicated threads for the transition from NIA to NIR. Directory of multilingual doctors and mutuals without extra charges in /fr/annuaire.

FAQ

My employer is asking for my social security number, but I don't have it yet. What should I do?

That's normal. Give them your passport, residence permit, and translated birth certificate. They will register you themselves via the DSN, and you will receive your NIA on one of your first pay slips. In the meantime, they indicate internally "NIA in progress" and you are a compliant employee.

I saw my NIA number on my pay slip. Can I use it right away?

Yes. Create an account on ameli.fr with this number, your date of birth, and a provisional code sent by mail (within 7–10 days). From there, you can: declare a primary care physician, receive reimbursements, apply for CSS, and provide your number to the CAF.

How long do I have to wait for the permanent NIR?

In 2026, expect 2 to 6 months in most cases. In Île-de-France (CPAM 75, 92, 93, 94), it takes longer: 5 to 9 months, or even more if the INSEE blocks the translation of the birth certificate or requests additional certification. You can follow up via Ameli message or in the agency after 3 months without news.

Is my Chinese / Senegalese / Vietnamese birth certificate accepted as is?

No, except in rare exceptions. Birth certificates from mainland China, Vietnam, Senegal, Algeria, Morocco, Tunisia, Brazil, India, Cameroon, Ivory Coast, Mali, Congo must be translated by a sworn translator before a French court of appeal. Cost: 50 to 80 € per document, generally within 5 to 10 days. Official directory: annuaire-traducteurs-assermentes.justice.gouv.fr.

I've lost the letter with my provisional Ameli code. How can I reconnect?

On ameli.fr, click "Forgot code" and identify yourself with FranceConnect (passport or digital identity) or request a new code to be sent by postal mail (5 to 7 days). You can also make an appointment at CPAM in person: an agent can reactivate your account on the spot in 5 minutes.