Assume that they all had the precise same treatment, down to the number of times their blood was checked.
Patient A (Blue Cross) will pay the Blue Cross price after their discount.
Patient B (Aetna) will pay the Aetna price after their discount.
Patient C (Medicaid) will pay the Medicaid maximum reimbursement amount
Patient D (Medicare Advantage) will pay a different amount after that discount.
Patient E (No insurance) will pay a rack rate that could be (and in fact is often) 5x any discounted price.
Etc.