Which of the following is NOT a red flag of health care provider fraud?

A consistently low percentage of coding outliers is not necessarily a definitive indicator of health care provider fraud, which is why it is the correct answer in this context. In many cases, certain practices or specialties might regularly fall within a narrow coding range due to the specific nature of the services they provide. This could be reflective of a provider's consistent and legitimate business model rather than a sign of fraud.

In contrast, medical records created long after an alleged patient visit raises significant concerns about authenticity and accuracy, indicating potential falsification of records to support fraudulent claims. Inconsistencies in support documents, such as discrepancies between the details of a claim and the documentation presented, also point to potential fraud as they suggest that the claims may not be substantiated. Finally, a lack of supporting documentation is a critical red flag because it prevents verification of the validity of claims being made, suggesting that the provider may be attempting to conceal fraudulent activities. Each of these points reflects behaviors or patterns that are more directly associated with fraudulent activity within health care services.