Final answer:
The primary feature of HIPAA is that it limits the availability of a patient's health care information to protect patient privacy and confidentiality.
Step-by-step explanation:
The primary feature of the Health Insurance Portability and Accountability Act (HIPAA) is that it limits the availability of a patient's health care information.
HIPAA sets the standards for the protection of patient information, requiring businesses that use health information to maintain strict confidentiality of patient records. This means that healthcare providers and insurance companies cannot disclose a patient's health information to unauthorized entities, ensuring patient privacy and confidentiality.