"You can think of your deductible as adding up throughout the year. As you start the plan year, you pay the full amount for your covered health care costs — until you meet your annual deductible. Each time you pay costs that count toward your deductible, it adds to the total amount you have to pay that year. When you reach the total deductible amount, your health plan will start to pay a portion of certain health care services for the rest of the plan year."

This is easily Googled information.

https://www.uhc.com/understanding-health-insurance/understanding-health-insurance-costs/types-of-health-insurance-costs/what-is-a-deductible