In a method for the administration of medical patient data with a centralized or decentralized patient medical file having secured access enabled by the patient or an enable code administered by the patient, wherein the patient data contain all previous examinations with data representing when the examination was conducted and the findings, a check-in of a patient into the device is implemented before a new examination by the physician, the check-in ensuing upon indication of the initial suspicion as well as of the planned examinations, an enable of these examination via a comparison device, particularly an expert system, ensues only when no relevant, previous examinations are present in a specific, preceding time span, and invoicing for the new examination is possible only in conjunction with a documentation of the examination and its results in the patient medical file.