To comply with HIPAA, under usual circumstances, a covered entity must act on a patient's request to review or copy his or her health information within how many days?

Under HIPAA (Health Insurance Portability and Accountability Act), a covered entity is required to respond to a patient's request to access their health information in a timely manner. Specifically, the regulation stipulates that a covered entity must act on a patient's request to review or obtain copies of their health records within 30 days from the date the request is received.

This 30-day timeframe is designed to ensure that patients have reasonable access to their health information while still allowing covered entities enough time to process the requests and ensure the information is provided accurately and securely. If a covered entity cannot fulfill the request within this period, they are allowed a one-time extension of up to 30 additional days, provided they notify the patient of the delay and the reason for it within the original 30 days.

Therefore, the answer of 30 days aligns with HIPAA's requirements and is the correct choice.