The National Health Fund and KL insurance in Poland: how does it work?

This is one of the most common questions asked by foreigners in Poland: can I use the NFZ if I only have KL insurance? In practice, these two solutions work differently. The NFZ is a public system of benefits financed by contributions or special entitlements. KL insurance (medical expenses insurance) is a private policy that covers the costs of visits, tests, and treatment in accordance with the terms of the contract.

The most important rule is that KL insurance alone does not „include” you in the NFZ. However, you can use medical assistance in Poland, but the settlement will be based on a private policy or on a fee-for-service basis. In this article, I explain how to use the NFZ, when KL is sufficient, and when it is worth taking out separate NFZ insurance.

The National Health Fund (NFZ) provides access to services in public facilities, but requires entitlement to benefits. This entitlement usually results from paying contributions (e.g., employment and registration with the Social Insurance Institution (ZUS)), being a family member of an insured person, or other specific regulations. If you do not have such entitlement, the facility may treat your visit as commercial.

KL insurance acts as „coverage” for medical treatment in the event of sudden illness or accident, within the scope specified in the General Terms and Conditions. Typically, it covers, among other things, outpatient care, doctor's visits and fees, tests, hospital stays, and medications and dressings. This is not compulsory insurance and does not replace the National Health Fund, which is often explicitly stated in the product documents.

In common understanding, „using the NFZ” means receiving treatment at a facility that has a contract with the NFZ without paying out of pocket. In practice, it means that the service is settled by the public system. If you are not entitled to benefits, simply visiting a doctor at a clinic with an NFZ contract does not mean that the NFZ will finance it.

That is why, when registering, you will be asked for a document confirming your insurance with the National Health Fund (e.g., through the Social Insurance Institution). KL insurance is a different document. It can help cover the costs of treatment, but it is not a „card” for the National Health Fund system.

KL insurance may be sufficient if you are not eligible for NFZ (National Health Fund) coverage and want to ensure that your medical expenses in Poland are covered legally and securely. In many policies for foreigners, the insurer arranges appointments and settles costs cashlessly if you contact the assistance service and go to the designated facility.

KL is also a good choice if you want to have a clear limit of liability and a procedure for dealing with sudden health problems. However, it is worth making sure that you know exactly what your medical expenses insurance covers and what the exclusions are. If you are still choosing a plan, you may find this article helpful: policy coverage.

In practice, you will encounter two models. The first is cashless settlement: you call the assistance hotline, and the insurer directs you to a facility and pays for the service. The second is reimbursement: you pay, collect the documents, and submit a claim for reimbursement. In both cases, medical records and receipts are essential.

If you want to avoid misunderstandings, check before your visit whether the facility cooperates with your insurer and whether prior approval is required. This is particularly important in the case of more expensive diagnostics and hospitalization.

If your goal is to take full advantage of the National Health Fund (NFZ) in Poland, you need to be eligible for health insurance. This is most often granted through employment (employment contract or contract of mandate), running a business, sometimes student status, or registration as a family member of an insured person. Simply having a KL policy does not make you eligible.

In practice, it is worth approaching the matter in two ways: the National Health Fund provides access to public healthcare, while private health insurance can protect you in situations where you need quick assistance, private treatment, or additional services. If you have doubts about who private health insurance is best for, take a look at: For whom is KL insurance.

If you do not have NFZ insurance, state clearly that you want a commercial appointment and that you have private health insurance. Ask whether the facility settles accounts with your insurer without cash and whether it will issue an invoice in your name. This speeds up the process and reduces the risk of the appointment being incorrectly classified.

If you are entitled to NFZ coverage, carry documents confirming your insurance or the possibility of verifying it. If you do not have confirmation, the facility may ask you to pay or provide the documents at a later date.