On a smaller scale, unethical physicians, hospitals and businesses are committing millions if not billions of dollars of fraud every day by billing for unnecessary services, misrepresenting the value of the services for which they bill, self-referring in violation of the Stark Law or violating the Federal Anti-Kickback law. Fraud by such medical providers have been exposed by a diverse group of whistleblowers including billing staff, competitors, sales and marketing staff for drug companies and other providers and patients.