Just a heads up, if you use this service PillPack and Amazon Employees have full access to your entire prescription history. Full name, social everything - it was common for employees to look up the info of celebrities / other employees for fun. Any prescription / healthcare info you give them will be sold back to SureScripts and used to sell you more garbage from Amazon ;) https://www.wsj.com/articles/amazon-mail-or…
So, if I wasn't able to look what book a customer purchased, I highly doubt I could see anyone's RX, especially since HIPAA is very clear on those points.
TL;DR: I think your claim is full of it.