Which is not a primary source for organ and tissue donation?

A) Beneficence: Beneficence refers to the obligation to do good for the patient and promote their well-being. While related, it's not specifically about avoiding harm.

B) Nonmaleficence: Nonmaleficence is the ethical principle that emphasizes the obligation of healthcare providers to do no harm to the patient. It involves avoiding the infliction of harm, preventing harm, and removing harm.

C) Autonomy: Autonomy refers to respecting the patient's right to make decisions about their own healthcare. It's about informed consent and self-determination, not specifically about preventing harm.

D) Veracity: Veracity refers to truthfulness and honesty in communication with patients. While important, it doesn't directly address the principle of preventing harm.

Covers services of nurse practitioners: Medicare does cover services provided by nurse practitioners within their scope of practice.

Does not pay full costs of certain services: Medicare often does not cover the full cost of certain services, and beneficiaries are responsible for copayments, deductibles, and sometimes premiums.

Finances a large portion of maternal and clinical care for the poor: Medicare, along with Medicaid, plays a significant role in financing healthcare services, including maternal and clinical care, for low-income individuals and families.

Supplemental insurance is necessary: While Medicare covers a wide range of services, there are gaps in coverage. Many beneficiaries choose to purchase supplemental insurance, also known as Medigap, to help cover the costs that Medicare doesn't, such as copayments and deductibles.