Final answer:
The billing department manager reviewing claims paid by the HIJ insurance company is conducting an internal audit to ensure the accuracy of financial transactions and compliance with policies and regulations.
Step-by-step explanation:
When the billing department manager reviews the claims paid by HIJ insurance company, this is typically considered an internal audit. An internal audit is a company's own assessment of its financial operations and records. This process is usually conducted by someone inside the organization, like the billing department manager, to ensure the accuracy and proper handling of claims and payments.
The internal audit will often check for compliance with relevant laws and regulations, accuracy of financial transactions, and operational efficiency. In this case, it may involve verifying that the claims have been processed correctly and paid in accordance with the insurance policies and with any applicable healthcare regulations.