As a medical provider, you want what's best for your patients. You never want to file claims for services they don't receive. Not only would it be unethical, but it's illegal. You believe that your patients should only pay for the services you provide. Sometimes, you're kind and don't even charge them for minor things, like a sudden, quick office appointment, especially if they're hurting for money. You're an upstanding medical professional.
Despite the fact that you wouldn't knowingly file a fraudulent claim, you've been accused of doing so. Several patients have claimed you charged them for services you didn't actually provide. You don't know how it happened, but you believe there's an error in the books somewhere due to a computer malfunction or a new hire's mistakes.