The CPAM and Foreign Employees: What Every Employer Needs to Know

The CPAM manages health insurance for employees affiliated to the French general social security scheme. Not all foreign employees fall under its remit, however. A colleague posted from abroad remains covered by their home country’s scheme and has no formalities to carry out with the CPAM. Conflating the two situations can block the DSN, delay access to healthcare, or generate unexpected regularisations.

This article sets out who is affected, how the process works in practice, and which situations call for particular vigilance.

Which Foreign Employees Fall Under the CPAM?

The answer depends on the employee’s status, not their nationality. Four situations can be distinguished:

The case of the posted worker deserves closer attention. When a foreign company sends an employee on assignment to France, that individual remains affiliated to the social security scheme of their home country, provided they hold a valid A1 certificate. The host company has no formalities to complete with the CPAM. It is local hiring that creates the obligation to affiliate, not the employee’s nationality.

For the complete legal framework governing affiliation obligations and associated risks: Affiliation to the French Social Security scheme: obligations and risks.

For EU nationals in a situation of economic inactivity: Verification of rights for economically inactive EU nationals by the CPAM.

The CPAM Affiliation Process for a Foreign Employee

Affiliation follows three stages. The employer manages the first two.

1. The Pre-Employment Declaration (DPAE)

The DPAE must be filed with the URSSAF within the eight days preceding the employee’s start date. This formality is mandatory but separate from the Social Security registration process. Affiliation is triggered once the application has been submitted to the CPAM.

2. Registration with the CPAM

This is the stage where most files encounter delays. The CPAM in the employee’s area of residence (with the exception of Talent permit holders and ICT posted workers, who are handled exclusively by the Paris CPAM) processes the file on the basis of several supporting documents, the validity and compliance of which are examined on a case-by-case basis according to the employee’s profile and country of origin. A missing document, a translation deemed non-compliant, or a document issued outside the required timeframe: the procedure starts over from the beginning, extending the processing time accordingly.

3. Assignment of the NIA, Followed by Issue of the NIR and Carte Vitale

During the processing of the file, the CPAM assigns a temporary identification number (NIA). Once the file has been validated, the employee receives their NIR (definitive Social Security number) and can apply for their Carte Vitale.

Processing times observed in practice: 6 to 8 weeks to obtain the NIA, followed by a further 6 to 8 weeks for the NIR, for all employee profiles.

For the full Carte Vitale process: Carte Vitale for a Foreign Worker: What It Is and How to Apply.

The NIA: What Employers Must Manage During the Waiting Period

During the weeks between the DPAE and the issue of the definitive NIR, the employee holds their NIA. This provisional number allows them to obtain a certificate of entitlement and access healthcare reimbursement. It does not allow them to open an Ameli account or receive a physical Carte Vitale.

If the employee has not yet obtained their NIA, and whilst awaiting their definitive NIR, the employer may use a temporary technical number (NTT) during the first three months of the contract. For the employer, this represents a concrete operational constraint. The monthly DSN requires the Social Security number of each employee. The system accepts this provisional number, but beyond three months the NTT must be replaced by the NIA at a minimum, bearing in mind that the slightest error in its entry generates processing rejections.

⚠️ Key point: An absent or incorrect NIR can block affiliation to the company’s complementary health scheme and expose the employer to penalties. Incorporating NIR collection into the onboarding process for every new foreign employee is a straightforward precaution that prevents unnecessary complications.

For a clear explanation of the difference between the NIA and the NIR and the implications for your company: What is the Waiting Identification Number (NIA)?

Special Situations to Anticipate for Your Foreign Employees

Return from Expatriation

An employee returning to France after a period abroad does not automatically re-affiliate. Rights must be reactivated, with specific formalities to be completed upon their return.

⚠️ Key point: A poorly anticipated process can leave the employee without health cover for several weeks after returning to work. The steps to follow can be found in our article on Social Protection reinstatement after expatriation.

EU Nationals on Mobility Assignments

EU nationals residing in France may be subject to CPAM checks regarding their residence and employment situation. A European national classified as “economically inactive” — most commonly accompanying spouses — may have their rights called into question. Our article examines these situations: Verification of rights for economically inactive EU nationals by the CPAM.

Departure from France Before the End of the Contract

CPAM cover does not cease with the end of the employment contract. For cover to end, the employee must declare their departure from France to the CPAM. The employer must also report this to avoid cotisations being paid in error and unresolved administrative situations.

Employees from Countries Without a Bilateral Agreement

To check whether the employee’s home country has signed a bilateral social security agreement with France, CLEISS (the Centre for European and International Social Security Links) is the reference source. In the absence of an agreement, affiliation to the CPAM is mandatory but processing times are considerably longer: allow three to four months in the most complex cases, with additional documentation required.

How France Immigration Manages CPAM Affiliation for Your Foreign Employees

The Social Protection experts at France Immigration support companies through all CPAM formalities: registration from the date of hire, file monitoring, management of waiting periods, reactivation of rights upon return from expatriation, and handling of cases outside bilateral agreements.

With over 2,000 files processed each year and direct contacts within the primary health insurance funds, our experts ensure your employees are covered without delay and your declaratory obligations are met.

Conclusion

CPAM affiliation for your foreign employees is not a secondary formality. A missing NIR not only blocks the DSN; it also leaves the employee without cover and creates issues for pension contribution records. A poorly anticipated return from expatriation leaves the employee without health cover for weeks on end. The new requirements on birth certificates, in force since January 2026, caught many HR teams off guard, and many employees too.

The best approach is to anticipate requests in case birth certificates need to be re-obtained from the country of origin.

France Immigration manages all of these formalities, drawing on 20 years of expertise in international mobility and a client base of over 350 companies. Contact our social protection specialists to assess your obligations.