What principle relates to never revealing any personal information about the patient?

Confidentiality is a fundamental principle in healthcare that mandates healthcare professionals to protect patients' personal information and ensure that it is not disclosed without their consent. This principle is essential in fostering trust between patients and providers, allowing individuals to feel secure in sharing sensitive information necessary for their care.

Maintaining confidentiality involves adhering to legal regulations, such as HIPAA in the United States, which establishes standards for protecting health information. Violating confidentiality can lead to legal consequences and damage the patient-provider relationship, as patients may be less inclined to seek care or be honest about their health history if they fear their information might not be kept private.

The other principles mentioned, such as beneficence, autonomy, and nonmaleficence, serve different yet important roles in healthcare ethics. Beneficence focuses on acting in the best interest of the patient, autonomy emphasizes the right of patients to make informed decisions about their care, and nonmaleficence underscores the obligation to do no harm. While all these principles are crucial in medical ethics, confidentiality specifically pertains to the protection of personal information, making it the correct answer in this context.