This was an authorized payment, therefore you would not be able to stop it. While I can understand your frustration with the doctor, you really need to resolve this with him. There are state laws that protect those that provide services, i.e. doctors, plumbers, etc. I agree that he should have told you that there was no change; maybe he did it because it had been almost one year? Perscriptions are only good for 1 year.
Good luck with the doctor.
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Compliance-—"It’s not about having a piece of paper, it’s about reading it." -----Ken Golliher