CO-240CO group · Coding

CO-240 denial code: the diagnosis is inconsistent with the patient's birth weight

CO-240 belongs to newborn claims, where a single number drives both the coding and the payment.

CO-240 fires when a diagnosis on a neonatal claim conflicts with the birth weight recorded. Birth weight determines several diagnosis assignments and influences payment grouping, so the edit is applied strictly.

What CO-240 means

Birth weight is captured in grams and reported in a specific field, and it is one of the most frequently mistyped values on a neonatal claim. Where the weight is absent, the edit cannot reconcile anything and denies by default. Where it is present and wrong by an order of magnitude, the diagnosis genuinely does conflict. The delivery record settles both, and it is the document to attach.

Why CO-240 fires

  • The birth weight field was left empty on the claim.
  • The weight was entered in the wrong unit or mistyped.
  • The diagnosis assigned does not correspond to the documented weight.
  • The weight changed between records and the claim used the wrong one.

Is CO-240 worth appealing?

Sometimes worth appealing

Correct the weight or the diagnosis from the delivery record. This is a reconciliation rather than a coverage dispute, and the record resolves it directly.

How to resolve or appeal CO-240

  1. 1

    Pull the delivery record

    The documented birth weight in grams is the authority for both the field and the diagnosis.

  2. 2

    Reconcile weight against diagnosis

    And correct whichever of the two the record contradicts.

CO-240 — frequently asked

Why is birth weight so important?
It drives diagnosis assignment and payment grouping for neonatal care, which is why payers edit on it rather than accepting the diagnosis alone.
Which do I correct?
Whichever the delivery record contradicts. The record is the authority, not the claim.

Related guides

CO-9 · CodingCO-11 · CodingCO-16 · Administrative

Sources

Reason-code meanings are paraphrased from the X12 Claim Adjustment Reason Code list for plain-language reference; they are not reproduced verbatim. This is general information, not legal, coding, or medical advice — always confirm against the payer's remittance and policy.

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