This official form allows the cross-border worker to choose their health insurance scheme: LAMal (Switzerland) or CMU / PUMA (France). The right to choose must be exercised within a legal deadline — usually 3 months from the start of activity in Switzerland or a change in circumstances.

À quoi sert-il ?

• Formalize your choice between LAMal and CMU.
• Notify the competent authorities (France/Switzerland) to open your rights.
• Éviter toute période sans couverture et sécuriser vos remboursements.

When to use it?

• Taking up employment in Switzerland (first contract, transfer, or resumption of activity).
• Change in situation that can reopen an option right.

Documents to plan for (indicative)

• Proof of employment in Switzerland (contract, employer's certificate).
• Proof of identity and residence.
• État civil et composition du ménage si nécessaire.

This official notice details the practical and financial consequences of your choice between the CMU (France) and LAMal (Switzerland): contributions, coverage of healthcare in France and Switzerland, coverage for dependents

This form is the official document of the French Social Security to request your affiliation to the CMU (now PUMA) as a border worker. It is essential to validate your option right for the French regime.

À quoi sert-il ?

• Officialize your affiliation with the French Health Insurance (PUMA).
• Declare your cross-border status for the calculation of your contributions.
• Obtain your Vitale card and the opening of your rights in France.

When to use it?

• After exercising your option right for CMU/PUMA.
• From the start of your activity in Switzerland or from your change of situation.

Documents to plan for (indicative)

• Copy of your Swiss employment contract.
• Proof of residence in France.
• Copy of your identity card or residence permit.
• Duly completed and signed health insurance system choice form (the first document).

The S1 document (formerly E106) is a certificate of entitlement to healthcare in your country of residence. It is essential if you have chosen LAMal and wish to receive planned medical treatment in France (in addition to emergency care).

À quoi sert-il ?

• Certify your right to healthcare in France, even when affiliated with Swiss health insurance (LAMal).
• Allow the registration of your beneficiaries (family) under the French system.
• Ensure continuity in your medical care.

When to use it?

• As soon as you have registered with LAMal through a Swiss health insurance fund.
• À remettre à votre Caisse Primaire d’Assurance Maladie (CPAM) en France.

Documents to plan for (indicative)

• The S1 form must be issued by your Swiss health insurance fund.
• It must be accompanied by identity documents and proof of residence for each covered person.

This form (S3125) from the French Health Insurance is used by border workers affiliated with the CMU to request reimbursement for healthcare received abroad, especially in Switzerland.

À quoi sert-il ?

• Allow for the coverage of advanced health care costs in Switzerland or another EU country.
• Ensure reimbursement according to the rates and bases of the French Social Security.

When to use it?

• After paying healthcare fees in Switzerland and being affiliated with CMU.
• À envoyer à votre CPAM accompagné des factures détaillées et preuves de paiement.

Documents to plan for (indicative)

• Original and detailed invoices for care.
• Proof of payment.
• Your up-to-date Vitale card or a certificate of rights.

This form 750 CNAM is the document to use to request a change in health insurance scheme in certain specific situations, particularly if you were affiliated in France and are changing your status (for example, if you become a border worker).

À quoi sert-il ?

• Report any change in circumstances that affects your health insurance coverage.
• Switch from one regime to another (for example, from classic PUMA to cross-border PUMA).

When to use it?

• In the event of a change in professional or personal status.
• À remettre à votre CPAM en fonction de votre nouvelle situation.

Documents to plan for (indicative)

• Any document proving your change of situation (e.g., employment contract, activity certificate).
• Old Vitale card and a certificate of rights if applicable.