RemitBench/Denial codes/CO-131

CO-131 denial code

Code 131 records a discount that applies to this claim rather than to your contract. It often means a third party you have no agreement with priced the claim.

The code list's own wording: Claim specific negotiated discount.

What it means: Someone agreed a price for this claim that is not your standard contracted rate. On an out of network claim it is usually a repricing company acting under an agreement with the payer.
Who owes the money: The practice, if you agreed CO makes it a write-off, which is right when the discount comes from an agreement you signed. Where it comes from a network you never joined, that is worth challenging rather than absorbing.
Is appealing worth it: Sometimes. Not on the merits of the care, but on whether the discount applies to you at all. Ask which agreement it was taken under and whether you are a party to it.

Ask which agreement produced the discount. This is the whole page. If you have a contract with that payer, a negotiated discount is normal and you absorb it. If you do not, the discount may have come from a rented network or a repricing vendor, and whether it binds you depends on an agreement you should be able to see.

Why the payer sent it

Your own contract with the payer sets a rate for this service.
The claim was repriced through a rented network the payer has access to.
A third party repricing vendor applied a discount on an out of network claim.
A one off negotiated rate was agreed for this case, sometimes by your own office.
A single case agreement covers the treatment.

Read the letters in front of the 131

CO-131: Contractual obligation. Correct where a contract exists. Questionable where one does not.
PI-131: Payer initiated. Not the patient's money.
OA-131: Other adjustment. Informational.

What to do next

Find out who negotiated it

The payer, a rented network, or a repricing vendor. Ask by name, and ask for the agreement reference.
If it is a network you never joined: say so in writing and ask for the claim to be reprocessed at your billed charge or your actual contracted rate.
Compare the discount against your contracted rate

If you do have a contract, the number should match it. A discount deeper than your contract allows is a reprocessing request.
Check what this means for the patient balance

A repriced out of network claim changes what the patient owes. Work that out before the statement goes out rather than after.

Codes that get mixed up with 131

Code	How it differs from 131
45	Charge exceeds the fee schedule. Your standard contractual write-off. See CO-45.
94	Processed in excess of charges. The payer allowed more than you billed. See CO-94.
59	Multiple procedure reduction. A rule rather than a negotiation. See CO-59.

Code 131 in dental

Dental network rental is common, and it is the usual story behind a 131 on a claim from a payer you have never contracted with. A discount arrives, the practice absorbs it, and nobody asks where it came from.

Ask once, then decide

The question is short: which agreement is this discount taken under. If the answer names a network you joined, possibly years ago and possibly through another organisation, then it is legitimate and you know. If nobody can name one, you have grounds to ask for the claim to be reprocessed.

Questions people ask about CO-131

Do I have to accept a CO-131 discount?

It depends on whether you are party to the agreement it came from. A discount under your own contract with that payer is normal. A discount applied by a rented network or a repricing vendor binds you only if you joined that network, and asking which agreement was used is a reasonable first question.

Related codes

Back to all denial codes

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