Final answer:
HIPAA defines four permissions: Authorization, Revocation, Access, and Amendment.
Step-by-step explanation:
The Health Insurance Portability and Accountability Act (HIPAA) defines four permissions. These are:
- Authorization: Permission given by the patient to disclose their protected health information (PHI) to a specific person or entity.
 - Revocation: The right of the patient to withdraw their consent for the disclosure of their PHI.
 - Access: The patient's right to access and obtain a copy of their health records.
 - Amendment: The ability for patients to request changes or corrections to their health records if they believe the information is inaccurate or incomplete.