A co-payment, often referred to as a co-pay, is a fixed amount that a patient pays for a specific medical service or prescription at the time of receiving care. This fee is typically outlined in a health insurance plan and can vary based on the type of service, such as a doctor's visit or a specialist consultation. Co-payments help share the cost of healthcare between the patient and the insurance provider, making it more affordable for patients to access necessary services. Understanding your health insurance plan's co-payment structure is essential for managing healthcare expenses effectively.