The practice of the tax administration should respect the constitutionally protected medical confidentiality and the right to privacy of patients. Meanwhile, in recent years, the National Revenue Administration carried out inspections in healthcare facilities to such an extent, that the inspectors used information from medical documentation. Such actions – despite the fact that they are aimed at elimination of possible irregularities in the scope of income taxation – do not deserve approval due to the risk of violation of constitutional rights to privacy in the field of health condition of the citizen. The methodology of the inspections, including, for example, assessing the income of doctors based on the number of prescriptions they issue, is largely flawed. Financial interest of the State and medical confidentiality should be satisfied and protected wisely. Practice which results in conflict of these constitutional values should be avoided. This article is intended to highlight areas in which, such a conflict has occurred in recent years, but above all to indicate fields in which the rightly protected individual and public interests can be reconciled.