Check that your national health system or insurance covers the planned treatment.
Decide how you want the costs of treatment to be covered.
Reimbursement will be provided according to the conditions and reimbursement rates in the country where the treatment takes place. If you choose this option, you can access publicly provided healthcare, and you'll need to apply to your national health insurance body for prior authorisation
(form S2) to go abroad for treatment.
If you have a right under national law to the treatment you're applying for, but it can't be provided within a medically reasonable time, authorisation must be granted. If you're not automatically entitled to the treatment, however, your national health insurance body is free to refuse authorisation if it so decides.
Provided that you have obtained form S2, the costs of treatment will be reimbursed in accordance with the rules in the country where you are treated. This will be dealt with by the relevant institutions in your home country and the country of treatment so as a rule you will not have to pay upfront.
You can opt to pay upfront for treatment and claim reimbursement later according to the reimbursement rates applied for the same treatment in the country where you are insured. If you are insured in a country that does not use reimbursement, then there will be a tariff corresponding to the cost of that treatment to the system.
It doesn't matter whether the hospital or clinic which will be treating you is public or private.
In some limited cases you may have to apply for prior authorisation - check this with your health insurance body or National Contact Point. Again, your application must be granted if you would otherwise have to wait too long for treatment at home.