Submit a claim void (frequency type 7) and a claim replacement (frequency type 8) to correct a previously submitted X12 837 claim

Verified steps

1. Identify the claim requiring correction: obtain the original claim's payer ICN (internal control number) from the 835 ERA or 277 claim status response; this is the REF*F8 or REF*1K value you will reference in the corrected submission
2. For a void (frequency type 7): build a new 837 transaction identical in structure to the original but set CLM05-3 (claim frequency type code) to '7'; include the original ICN in REF*F8 (original reference number) within Loop 2300; submit to void the entire original claim and reverse any payment
3. For a replacement (frequency type 8): build a new 837 with the corrected claim data and set CLM05-3 to '8'; include REF*F8 with the original ICN; the replacement simultaneously voids the original and submits the corrected claim in a single transaction
4. Verify the corrected claim is within the payer's timely filing window from the original date of service; if the original was denied and the correction is a resubmission, distinguish between frequency code '1' (original) for a fresh submission and '8' (replacement) for correcting a previously paid or processed claim
5. Monitor the 999 and 277CA for the voided/replacement claim; check the 835 ERA for a reversal transaction (CLP02 status code '22' for reversal) if a void was processed, and a new payment record for the replacement
6. Document the void/replacement chain in your AR system: link the new ICN to the original ICN and record the reason for correction to satisfy audit requirements