Final answer:
The statement is true; if the pre- and postoperative diagnoses are different, the preoperative diagnosis should be reported to ensure accurate medical records and appropriate billing.
Step-by-step explanation:
If the pre- and postoperative diagnoses are different, the preoperative diagnosis should be reported. The correct answer to this statement is A) True. In medical coding and billing, it is crucial to document both the preoperative and postoperative diagnoses if they differ. This ensures accurate medical records and proper billing. The preoperative diagnosis represents the condition that led to the decision for surgery, and this diagnosis is used for insurance claims and to justify the medical necessity for the operation.