How does CVS Caremark work? Medical ID Provide the pharmacy with your medical ID card. Insurance Coverage The pharmacy will run your prescriptions through insurance and the total amount due is owed to the pharmacy. Deductible Reached Once you reach the deductible amount, you will then pay your share of coinsurance per the chart on the previous slide. Deductible Contribution The total amount owed will then count towards your deductible. Out-of-Pocket Max Once you reach your total out-of- pocket max, your insurance will pay 100%.