What is the validity period of a patient's authorization for disclosure of PHI?

The correct choice highlights that a patient's authorization for the disclosure of Protected Health Information (PHI) remains valid until the patient chooses to revoke it or until the expiration date specified in the authorization form is reached. Under HIPAA regulations, valid authorizations must include an expiration date or a specific event that will trigger the expiration of the authorization, ensuring that patients have control over their health information and can manage the timeframe during which their information may be shared. This provision reinforces the importance of patient consent in healthcare communications, ensuring that disclosure is timely and that patients are aware of their rights regarding their health information.

The other options do not accurately capture the regulatory requirements for the duration of such authorizations. While some authorizations may indeed specify a timeframe of one year or six months, these are not universally applied standards, making option B and D misleading. The first option, which states validity until revoked by a court, does not reflect the intent of patient control and revocation rights under HIPAA.