If you’re going to use a POS system to do anything more than accept credit or debit cards, then you’ll need to contact your payment processor and ask to sign a business associate agreement (BAA) with them in order to become fully HIPAA compliant. While most POS systems are PCI compliant and offer payment processing security, not all will enter into a BAA and grant you full HIPAA compliance. Make sure to contact all payment processors you’re interested in and ask about their HIPAA compliance and if they will enter into a BAA with you.