To help non-US people understand this plan:
> but it is the minimum $0 monthly premium plan.
The monthly premium is the cost of the insurance plan. A "$0" premium isn't actually $0, it means that Amazon is paying 100% of the monthly costs of maintaining the insurance, requiring $0 contribution from the employee. Many companies (especially warehouse type operations) are less generous, and require some monthly contribution from the employee to pay the premium. The worst health insurance I ever had required me to pay 100% of the monthly premium, with $0 committed by the company. That company lost a lot of employees.
> I pay 100% of the first $1500
This is the "deductible". The covered person is responsible for 100% of costs until the deductible is met, although there are many exceptions. For example, a routine checkup might be 100% covered ($0 cost), as well as a range of preventative care procedures described by the ACA.
> then 10% of the next $15,000
After the deductible has been met, the person is responsible for coinsurance of additional costs. An extra $5000 procedure would translate to a $500 bill for the patient.
> then 0% of anything over $16,500.
This is where the "out of pocket maximum" or OOPM is reached. In this case, the most the patient could expect to pay is $1500 (deductible) + $1500 (10% of next $15K) = $3000. After that, all excess charges are handled by the insurance company until the insurance year resets.
In short: Health care will cost between $0 and $3000 depending on how many services are used for the year (excluding fully covered benefits like annual checkup, depression screening, breast cancer screening for women, vaccinations, and other services covered for free under the ACA)