OA-23 — Prior payer’s adjudication impact
Claim-adjustment reason code 23 · typically reported as OA-23
What it means
Informational on secondary claims: shows the amount the primary payer already paid/adjusted, which this payer subtracted before computing its share.
Why DME claims hit it
- Normal on every Medicare-secondary or commercial-secondary DME claim
How to fix it
- Nothing to fix — verify the secondary math is right and post accordingly
Appeal posture
Not a denial.
Related denial codes
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