Use code 77091 to bill for the technical component, and 77092 for the professional charge. 77090 is only used in rare instances (refer to the next question below).
Codes 77089 or 77092 cannot be used to bill for services under the Outpatient Prospective Payment System (OPPS) as they contain a professional component and are not assigned to any APC. They are only paid under the Physician Fee Schedule (PFS).