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Pathology/Lab Coding Alert

Path/Lab Coding:

Modify Your Understanding of QW Use

Published on Mon Jan 19, 2026

Question: I am still confused about when to append modifier QW to a lab test. What advice can you give me? Revenue Cycle Insider Subscriber Answer: Knowing when, and when not, to append modifier QW (CLIA waived test) to a lab test is often confusing, especially to those new to path/lab coding. But the following advice should help you get [...]
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Pathology/Lab Coding Alert