OA-136Other AdjustmentCoordination of Benefits
OA-136 Denial Code: Failure to follow prior payer's coverage rules
The secondary payer denied because the claim didn't comply with the PRIMARY payer's rules — e.g., you skipped the primary's network or auth requirements, so the secondary won't pick up the difference.
Why OA-136 happens
- ●Out-of-network with the primary, then billed the secondary for the balance
- ●Primary denied for no-auth; secondary follows the primary's determination
How to fix a OA-136 denial
- 1
Fix the primary-payer issue first (appeal, auth, network exception) — the secondary follows
- 2
If the primary's denial was correct, the balance is typically not payable by the secondary
How to prevent it
Follow the primary plan's rules even when a generous secondary exists.
Drowning in OA-136 denials?
OakClaim works every denial within 48 hours and builds prevention rules so they stop recurring.