Yes. What you pay for drugs may vary, depending upon how the plan sets up its network. Plans are allowed to have preferred and non-preferred network pharmacies, and they are allowed to charge more for drugs purchased at the non-preferred locations. They may also charge less if you use a mail order pharmacy.
The pricing difference will be very limited if you are receiving a low-income subsidy. In that case, for the remainder of 2019 you will pay no more than $8.50 for your brand-name drugs ($3.40 for generics) if you go to a pharmacy that is in the plan’s network. In 2020, costs are no more than $8.95 for each brand-name and $3.60 for each generic covered drug.