23: The impact of prior payer(s) adjudication including payments and/or adjustments.
This line reflects how a prior payer's payment and adjustments affected what this payer paid. It is normal on secondary or tertiary claims, showing the balance remaining after the primary insurer's payment was applied.
What the group code means
- OA
- Other Adjustment. Used when neither CO nor PR applies.
Why it fires
- The claim was submitted as secondary or tertiary, and this line shows the adjustment made because of the primary payer's EOB
- The primary payer paid an amount or applied a contractual adjustment that reduces what is owed by this payer
Corrective actions, ranked
- 1
Confirm this is a secondary claim
Verify the claim was correctly submitted with the primary payer's EOB or adjudication data attached.
- 2
Check the math
Confirm the secondary payer applied its own allowed amount correctly against the remaining balance after the primary's payment.
- 3
Resubmit with complete COB data
If the primary EOB details were missing or incomplete, attach full adjudication data and resubmit.
Is it worth appealing
Usually not appealable since this reflects normal secondary-payer math, but dispute if the secondary payer misapplied the primary's payment or adjustment amounts.
Retrieved 2026-07-18.
Do not let this happen again
Scrub the claim against NCCI PTP and MUE edits before you submit, free and in your browser.
DenialPath provides billing and administrative guidance based on published CMS and X12 sources. It is not medical advice, not a coverage determination, and not a guarantee of payment. NCCI and MUE edits are republished quarterly and payer policies vary by contract. Always confirm against the payer's own current policy before submitting or appealing.