Generally, the amount you have to spend on covered healthcare services and prescriptions out of pocket before your health insurance company starts to pay a percentage of your bills (coinsurance phase). Health plans can vary on what they count towards the deductible. Plans with lower premiums tend to have higher deductibles. All plans must provide many preventive services and screenings at no charge to you BEFORE you met the deductible. Plans may also offer other services with a copayment that do not apply to the deductible.