Health insurance is a type of coverage that pays for medical and surgical expenses incurred by the insured. It can reimburse the insured for expenses incurred from illness or injury, or pay the care provider directly. Health insurance protects you from high, unexpected costs, ensures you have access to regular medical care, and often covers preventive care like vaccines and check-ups.

A deductible in health insurance is the amount you pay out-of-pocket for healthcare services before your insurance plan starts to pay. For instance, if you have a $1000 deductible, you must pay the first $1000 of your medical expenses before your insurance company covers the rest. It's important to note that higher deductible plans usually have lower monthly premiums and vice-versa.

Generally, you can only change or cancel your health insurance plan during the Open Enrollment Period or during a Special Enrollment Period if you qualify for one due to a life event like getting married, having a baby, or losing other health coverage. After purchasing a plan, there is usually a minimum commitment period (often one year). Always check the specific terms and conditions of your policy for complete information.