The integration of XR technologies into healthcare has dramatically altered the landscape of medical practice, patient treatment, and medical engineering. This paper explores practical applications across three pivotal areas: XR for doctors, where anatomical visualizations help in preparation and smooth realization of complex surgical procedures and training; XR for patients, such as phobia treatment, orthopedic rehabilitation and personalized product configuration; and XR for medical engineers, showcasing the use of digital twins and virtual try-ons for innovative medical solutions. Several case studies of own experience are reviewed, demonstrating the real-world impact of these technologies. The presentation also addresses technical aspects of XR application development, particularly the creation of flexible, dynamic content, ensuring adaptability and personalization in healthcare settings. This exploration illustrates how XR can transform healthcare into a more intuitive, effective, and patient-centric field.