OA-B13Other AdjustmentDuplicate
OA-B13 Denial Code: Previously paid
Payment for this claim/service may have been made in a previous remittance — duplicate-payment flavored.
Why OA-B13 happens
- ●Rebill after payment already posted
- ●Payment posted to the wrong account, making the claim look unpaid
How to fix a OA-B13 denial
- 1
Trace the referenced prior payment across accounts and remits before pursuing anything
How to prevent it
Clean posting hygiene — misposted payments generate phantom AR and duplicate rebills.
Drowning in OA-B13 denials?
OakClaim works every denial within 48 hours and builds prevention rules so they stop recurring.