Investigations into fraud and abuse are also known as:

Investigations into fraud and abuse are referred to as health care oversight activities because these activities are part of a broader regulatory framework designed to ensure compliance with laws and regulations within the healthcare system. Oversight activities typically involve monitoring and auditing healthcare providers and organizations to prevent, detect, and address any fraudulent or abusive practices that may lead to improper billing, misuse of funds, or inadequate patient care.

Health care oversight encompasses various functions, including investigations, audits, and compliance reviews, all aimed at maintaining the integrity of healthcare delivery and protecting patient safety. This term is widely recognized in the context of compliance and regulatory activities, making it the most appropriate choice in relation to investigating fraud and abuse in healthcare.

The other options presented, while they may relate to aspects of healthcare, do not accurately capture the specific nature of fraud and abuse investigations as oversight activities do.