QW Modifier in Medical Billing
The QW modifier is used to indicate that a medical test is performed in a Clinical Laboratory Improvement Amendments (CLIA)-waived laboratory.
QW Modifier in Medical Billing Explained
In medical billing, the QW modifier is attached to certain diagnostic lab tests that are exempt from CLIA certification requirements. This modifier ensures that the test is processed correctly for reimbursement.
For example, a lab uses the QW modifier when billing for a rapid strep test that is CLIA-waived.
Discover common acronyms and abbreviations in Medical billing glossary.
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