Have you heard about the data transmission service but aren’t sure what it is or how to activate it? This feature streamlines your health reimbursements by automating communication between Social Security and your health insurance provider. In this article, we explain what data transmission is, why it’s essential, and how to activate it quickly.
Data transmission is an electronic system that connects your Social Security fund to your complementary health insurance. Thanks to this link, your reimbursements are processed automatically:
✅ Key benefit: No need to send your statements manually, everything is handled automatically.
You arrive at the pharmacy with your prescription. You show your “carte vitale” and the pharmacy tells you that the data transmission service is not active. What does that mean? Data transmission is the process of linking your Social Security center to your supplementary health insurance provider. That means, when your basic scheme reimburses its portion, it then sends the statement to your supplementary health insurance provider so that they can pay you the remaining portion (up to the level of your coverage limits). You therefore have nothing to do and no paperwork to send to your supplementary health insurance provider when your data transmission is activated.
If the service is not activated, you’ll need to download your reimbursement statement from the ameli.fr website and send it to your supplementary health insurance provider for reimbursement of the supplementary portion. If you have two supplementary health insurance providers (your employer’s, and your spouse’s as a beneficiary), you will only be able to link up to one of them using the data transmission service.
Without data transmission, you need to download your statements from ameli.fr and send them to your insurer. This takes time and can delay your reimbursements. With data transmission:
For those who regularly visit healthcare professionals, data transmission is a real convenience.
Go to the ameli.fr website and log in with your ID. Go to “Mes informations” and then the “Organisme complémentaire” section. Here you will need to find the name of your supplementary health insurance provider, your membership number and the information on the activation of data transmission with the words “Transmission automatique des paiements”.

Download your certificate of entitlement, and send it to your supplementary health insurance provider, requesting the activation of the data transmission service. Your supplementary health insurance provider will then contact your Social Security center to approve the link.
Go to the ameli.fr website and log in with your ID. Go to “Mes informations” and then the “Organisme complémentaire” section. Here you will need to find the name of your supplementary health insurance provider, your membership number and the information on the activation of data transmission with the words “Transmission automatique des paiements”.
⚠️ Important: If you have two insurers (for example, one from your employer and one through your spouse), only one can be linked via data transmission. You’ll need to send statements manually to the second insurer.
Activating data transmission can take a few days to several weeks, depending on how quickly your insurer and Social Security process the request. During this time, you’ll need to continue sending your statements manually.
By activating data transmission, you enjoy:
For families or individuals with regular healthcare needs, it’s a significant time-saver.