Question: New York Subscriber Answer: You can bill the FNA using 10021-PD (Fine needle aspiration, without imaging guidance). The modifier effectively turns the clinic-based procedure into a facility-based procedure. Therefore, your doctor will receive payment for his services at the facility rate rather than the outpatient fee schedule, and your clinic cannot bill for the costs associated with the supplies or other practice expenses related to the FNA. As of July 1, 2012, entities such as your practice that are wholly owned or operated by a hospital and that provide any diagnostic or related non-diagnostic services to a patient who is admitted to that hospital within three days must append modifier PD to the codes for those services. Practices self-designate during Medicare enrollment whether they're owned or operated as a hospital. The hospital is responsible for alerting the practices they own or operate if the patient is admitted. When practices append PD to a code that doesn't have both professional and technical components, Medicare will pay for the service based on the facility rate (rather than the non-facility rate). If a code has both professional and technical components, modifier PD will trigger Medicare to pay the practice for only the professional component. The technical component will be considered a hospital cost. Resource: