MA120MA-series (Medicare alerts & claim-level)Missing Information
MA120: CLIA number missing or invalid
Lab services require the performing lab's CLIA certification number; it's missing, invalid, or doesn't cover the test complexity billed.
Commonly appears with these denial codes
The denial code gives the category; MA120 pinpoints the specific problem. Read them together before touching the claim.
What to do about it
Add the correct 10-character CLIA number for the performing site and confirm the certificate level covers the test. Resubmit.
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