Here's the answer to your question: What is protected health information (PHI)?
Protected health information (PHI) is defined as ''any information which identifies or could be used to identify an individual and has anything to do with past, present or future physical or mental health conditions, care or payment for care''. The Health Insurance Portability and Accountability Act (HIPAA) regulates the privacy of PHI. Health care providers, health plans and health care claims clearinghouses are regulated by HIPAA. Protection of PHI extends to electronic communication.