Health Law
8 min read

How to Challenge a Refusal of Reimbursement by the French Social Security System

Équipe JuriliaLegal Writers & AI Experts
July 19, 2026

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Jurilia's articles analyze official decisions for purely educational purposes. They do not constitute personalized legal advice. Only a licensed attorney is authorized to deliver advice tailored to your specific case.

The French Social Security system sometimes refuses to reimburse care, medications, or medical procedures deemed necessary. Such refusals can be a source of frustration and financial difficulty, particularly when the expenses incurred are significant. Fortunately, French law provides avenues for appeal to challenge these decisions. In this article, we explain how to contest a refusal of reimbursement by the French Social Security system, detailing the steps to follow, the deadlines to observe, and the solutions available to assert your rights.


Why Might the French Social Security System Refuse Reimbursement?

Before initiating a challenge, it is essential to understand the reasons that may justify a refusal of reimbursement. The French Social Security system may invoke several grounds, including:

  • Billing or transmission errors: Sometimes, the refusal stems from an administrative error, such as an incorrectly completed invoice or an incomplete file. In such cases, a simple correction may suffice to secure reimbursement.

  • Medical grounds: The French Social Security system may determine that the care or procedure is not medically justified, particularly if it does not appear in the recommendations of the Haute Autorité de Santé (HAS).

If you believe the refusal is unjustified, you have the right to contest it. Here’s how to proceed.


Steps to Contest a Refusal of Reimbursement

1. Review the Refusal Decision

When the French Social Security system refuses reimbursement, it must notify you of its decision in writing. This notification must obligatorily:

  • Specify the reason for the refusal (Article R133-9-2 of the Code de la sécurité sociale). For example, if the refusal relates to a non-reimbursable procedure, the notification must clearly state this reason.

  • Mention the avenues and deadlines for appeal: The French Social Security system must inform you of the possibilities for contesting the decision and the deadlines for taking action. Generally, you have two months from receipt of the notification to initiate an appeal.

  • Indicate the modalities for recovering unduly paid sums: If the French Social Security system has already disbursed benefits before identifying an error, it may demand repayment. In such cases, the notification must specify the recovery conditions (e.g., deductions from future benefits or a payment schedule).

If this information is missing or incomplete, the refusal decision may be deemed irregular, which could work in your favour during an appeal.


2. Request an Amicable Appeal

Before initiating contentious proceedings, it is advisable to attempt an amicable appeal. This step often resolves the dispute without recourse to a tribunal. Here’s how to proceed:

a. Refer the Matter to the Commission de Recours Amiable (CRA)

To do so:

  • Draft a letter of contestation: Clearly explain why you are challenging the refusal, basing your arguments on factual elements (e.g., medical justifications, invoices, correspondence from your doctor). Attach a copy of the refusal notification and any relevant documents.

  • Send your request by recorded delivery with acknowledgement of receipt: Address your letter to the CRA of your local Caisse Primaire d’Assurance Maladie (CPAM). You can find the address on the ameli.fr website or on the refusal notification.

  • Respect the two-month deadline: Your request must be sent within two months of receiving the refusal notification. After this period, your appeal may be inadmissible.

b. Await the CRA’s Response

The CRA has one month to examine your request and notify you of its decision. If the CRA rejects your appeal or fails to respond within this period, you may proceed to the next step: a contentious appeal.


3. Initiate Contentious Proceedings

If the amicable appeal fails or if you receive no response within the allotted time, you may initiate contentious proceedings before the competent tribunal. Here are the steps to follow:

a. Refer the Matter to the Tribunal des Affaires de Sécurité Sociale (TASS)

To do so:

  • Draft a claim: Your claim must include:

  • Your full contact details.

  • The grounds for your contestation (why the refusal is unjustified).

  • Supporting documents (copy of the refusal notification, correspondence with the CPAM, invoices, medical certificates, etc.).

  • Send your claim by recorded delivery with acknowledgement of receipt: Address it to the registry of the TASS competent for your place of residence. You can find the tribunal’s contact details on the justice.fr website.

b. Prepare Your Case

To maximise your chances of success, it is crucial to prepare your case thoroughly. Here are some tips:

  • Gather all supporting documents: Invoices, prescriptions, medical reports, correspondence from your general practitioner, etc. The more complete your file, the harder it will be for the French Social Security system to uphold its refusal.

  • Seek assistance: If you wish, you can be assisted by a solicitor specialising in health law or by an association defending policyholders’ rights (e.g., the Fédération Française des Diabétiques or UFC-Que Choisir).

  • Prepare your arguments: Explain why the refusal is unjustified. For example, if the French Social Security system refuses reimbursement on the grounds that the procedure is not covered, verify whether the procedure is listed among those eligible for reimbursement (available on ameli.fr).

c. Attend the Hearing

The TASS will summon the parties (you and the CPAM) to a hearing. During this hearing:

  • Present your situation: Calmly explain why you are contesting the refusal. The judge may ask questions to better understand your case.

  • Respond to the CPAM’s arguments: The CPAM will defend its position. Be prepared to counter its arguments with your supporting documents.

  • Await the decision: The tribunal will issue its decision within a variable timeframe (generally a few weeks). If the judgment is in your favour, the French Social Security system will be required to reimburse you.

d. Appeal if Necessary

If the TASS judgment is not in your favour, you may appeal to the competent Cour d’appel. The deadline for appealing is one month from the notification of the judgment. The appeal must be lodged by declaration at the registry of the Cour d’appel, accompanied by supporting documents.


What to Do if the Refusal Persists?

If, despite all these steps, the French Social Security system maintains its refusal, you still have a few options:

1. Refer the Matter to the Défenseur des droits

The Défenseur des droits is an independent authority that can intervene in disputes with public administrations. While it cannot impose a decision on the French Social Security system, its intervention may sometimes resolve the situation. To refer the matter:

  • Complete the online form on defenseurdesdroits.fr.
  • Attach all documents relating to your dispute (copy of the refusal notification, correspondence, etc.).

2. Request a Recours Gracieux

A recours gracieux involves asking the French Social Security system to reconsider its decision outside of any contentious proceedings. To do this:

  • Send a letter to the director of your CPAM, explaining why you believe the refusal is unjustified.
  • Attach any additional documents if necessary (e.g., a new medical certificate).

This approach is less formal than contentious proceedings but may sometimes lead to a review of your case.

3. Consult a Specialist Solicitor

If the dispute is complex or the sums involved are significant, it may be useful to consult a solicitor specialising in health law. They can:

  • Advise you on the strategy to adopt.
  • Represent you before the TASS or the Cour d’appel.
  • Help you build a strong case.

Legal fees may be covered by your legal protection insurance (if you have one) or by legal aid (subject to means testing).


Concrete Examples of Successful Challenges

To illustrate these steps, here are some examples of challenges that resulted in reimbursement:

Example 1: A Medical Procedure Deemed Non-Reimbursable by the French Social Security System

Situation: A patient is refused reimbursement for an osteodensitometry (a scan to measure bone density) on the grounds that the procedure is not reimbursable for women under 50.

Solution: The patient provides a medical certificate attesting to a high risk of osteoporosis (family history, prolonged corticosteroid treatment). The CRA agrees to reconsider the case and grants reimbursement, in accordance with the exceptions provided for in the regulations (see avenant n° 21 du 1er décembre 2016 à la convention collective de la boulangerie-pâtisserie, which provides for reimbursement of this procedure for women over 50, as well as in cases of proven risk).

Example 2: A Refusal Due to an Administrative Error

Situation: A patient receives a refusal of reimbursement for physiotherapy sessions on the grounds that her doctor did not follow the coordinated care pathway (she consulted a physiotherapist without first seeing her general practitioner).

Solution: The patient provides a statement from her general practitioner explaining that the sessions were urgent and justified. The CPAM acknowledges the error and proceeds with reimbursement.

Example 3: Refusal to Cover an Occupational Disease

Situation: A nurse is refused coverage for her reactive depressive syndrome under occupational disease legislation on the grounds that her initial declaration referred to a "professional disease" rather than a "workplace accident".

Solution: The employee refers the matter to the Commission de Recours Amiable, then to the TASS. The tribunal rules that the claim is admissible, regardless of the initial classification of the pathology (see arrêt de la Cour de cassation du 9 octobre 2014, pourvoi n° 13-20.669). The French Social Security system is ordered to cover the disease.


Frequently Asked Questions

1. What is the deadline for contesting a refusal of reimbursement by the French Social Security system?

You have a two-month deadline from receipt of the refusal notification to initiate an amicable appeal (before the CRA) or contentious proceedings (before the TASS). After this period, your appeal may be inadmissible.

2. Can I contest a refusal of reimbursement without going through the Commission de Recours Amiable (CRA)?

Yes, but it is strongly recommended to refer the matter to the CRA first. This step often resolves the dispute amicably, without recourse to a tribunal. If you skip this step, the TASS may invite you to do so before ruling on your case.

3. Can the French Social Security system recover unduly paid sums?

Yes. If the French Social Security system has paid benefits in error, it may demand repayment. In such cases, it must notify you of its decision and propose a payment schedule (Article R133-9-2 of the Code de la sécurité sociale). You have seven days to accept the schedule or repay the sums. Failing this, the French Social Security system may deduct the amounts from your future benefits.

4. What should I do if the CRA does not respond to my request?

If the CRA does not respond within one month, this is equivalent to an implicit rejection of your appeal. You may then refer the matter to the Tribunal des Affaires de Sécurité Sociale (TASS) within two months of the expiry of this period.

5. Can I be reimbursed for the costs incurred in contesting a refusal?

In principle, the costs incurred in contesting a refusal (legal fees, court costs) are not reimbursable by the French Social Security system. However, if you have legal protection insurance (through your home insurance or a mutual insurance company), these costs may be covered. You may also apply for legal aid if your resources are limited.

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