Denial Code 131 (CO-131, PR-131) — Meaning & What to Do
Claim Adjustment Reason Code (CARC)
What denial code 131 means: A negotiated or contractual discount was applied.
What to do about denial code 131: For in-network care this is a normal write-off, not your cost.
CO-131 vs PR-131 vs OA-131: what the prefix means
| Code on your EOB | What the prefix means | Who typically pays |
|---|---|---|
| CO-131 | Contractual obligation — the provider writes the amount off | Usually not the patient |
| PR-131 | Patient responsibility | The patient |
| OA-131 | Other adjustment | Often another payer or plan |
The prefix tells you who is expected to absorb the amount; the number (131) tells you why.
Related codes
CARC 130A claim submission fee was applied.
CARC 132A prearranged demonstration-project adjustment was applied.
CARC 129Prior processing information for this claim is incorrect.
CARC 133The service is still under review (not final).
Keep reviewing your bill
- Medical Bill vs EOB: What Is the Difference?
- How to Dispute a Medical Bill — Find Billing Errors Before You Pay
Frequently asked questions about Denial code 131
What does denial code 131 mean on my EOB?
A negotiated or contractual discount was applied.
What should I do about denial code 131?
For in-network care this is a normal write-off, not your cost.
Found this code on your bill or EOB?
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