Final answer:
D) $15,000. The penalty for unlawful referrals in this case is $15,000.
Step-by-step explanation:
The penalty for unlawful referrals in the case mentioned would be a fine of $15,000 (Option D).
Unlawful referrals occur when a healthcare professional refers a patient to another provider or specialist in exchange for financial gain or other benefits. It is considered fraudulent and can lead to penalties under the Anti-Kickback Statute and Stark Law in the United States.
In this scenario, the ortho surgeon's request to send patients his way for personal benefit would fall under unlawful referrals, making the penalty for both parties involved $15,000.