Final answer:
Dr. Martin coding Mr. Biller's office visit as expanded problem-focused history despite no new actions is an example of upcoding.
Step-by-step explanation:
Coding in medical practice is governed by certain guidelines and standards. In this case, Dr. Martin is coding Mr. Biller's office visit as expanded problem-focused history, even though there were no new actions. This is an example of upcoding.
Upcoding refers to the practice of assigning a higher-level code to a service or procedure than what was actually performed or documented. It is considered inappropriate and can lead to fraudulent billing.