Quaternary care is an advanced level of medical care that goes beyond tertiary care, focusing on highly specialized treatments and procedures. It typically involves complex surgeries, experimental treatments, and advanced diagnostic tests. This level of care is usually provided in specialized medical centers or academic hospitals. Patients requiring quaternary care often have rare or severe conditions that cannot be effectively treated at lower levels of care. Examples include organ transplants, complex cancer treatments, and specialized neurosurgery. Facilities providing quaternary care often have access to cutting-edge technology and research, ensuring the highest level of medical expertise and innovation.