What does "subject to calendar-year deductible" mean for a health insurance plan?

I'm applying for Anthem health insurance, it says for Office Visit, "You pay 0%; subject to calendar-year deductible". The deductible for the plan is $10,000/year. What does "subject to calendar-year deductible" mean?
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That means you have to pay the deductible amount each year before the insurance kicks in.
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