Question: Florida Subscriber Answer: You'll need to check with each payer to determine which code to report. For Medicare, use 89321. Keep in mind: If your practice has CLIA-waived status, you can perform (and bill for) these tests and others. For your practice to perform CLIA-waived testing, Medicare requires that you: • Enroll in the CLIA program by obtaining a certificate and pay the certificate fee every two years. • Follow the manufacturers' instructions for the waived tests. • Notify your state agency of any changes in ownership, name, address, or director within 30 days, or if you wish to add tests that are more complex; and allow inspections by a CMS agent, such as a surveyor from the state agency (Your laboratory is not subject to a routine survey or inspection). • Append modifier QW (CLIA-waived test) to the code you're reporting for the test. For more info: