Joe is the Chief Executive Officer $($CEO$)$ of a company that handles medical billing for several regional hospital systems. How would Joe's company be classified under the Health Insurance Portability and Accountability Act $($HIPAA$)?$Joe is the Chief Executive Officer $($CEO$)$ of a company that handles medical billing for several regional hospital systems. How would Joe's company be classified under the Health Insurance Portability and Accountability Act $($HIPAA$)?$