Final answer:
A procedure where a government investigator audits a physician's office for proper documentation and coding is known as a Compliance audit. It ensures adherence to applicable laws and regulations, especially in healthcare billing and patient privacy.
Step-by-step explanation:
When a government investigator performs an audit at a physician's office to ensure that documentation and codes are complete, this procedure is known as a Compliance audit. A compliance audit is conducted to verify that an organization is following external laws, regulations, and policies correctly. In the context of healthcare, this type of audit may focus on ensuring that coding for billing purposes is accurate and that the office is in compliance with healthcare laws, such as HIPAA for patient privacy. Audits can also help in identifying areas where practices can improve in terms of efficiency and service quality.