Question: We’ve got a patient that received a computed tomography (CT) scan from a mobile stroke unit. Should I list the place of service (POS) code as the location where the provider read the scan? Virginia Subscriber Answer: You should refer back to the article titled Consider This Set of Lesser Known MCPM Radiology Guidelines which makes reference to the following guideline in the Medicare Claims Processing Manual: You will not be reporting this service from the location the provider interpreted the stroke mobile unit CT scan. Rather, you’ll find the POS code that most accurately represents where radiology technician or physician rendered the service. In this case, you will report POS code 15 (Mobile Unit).