CO-253CO group · Allowed amount

CO-253 denial code: sequestration reduction in federal payment

CO-253 is the clearest example in the code set of an adjustment with nothing behind it to argue with.

CO-253 reflects the sequestration reduction applied to federal healthcare payments under budget legislation. It is a statutory percentage taken from the payment after the allowed amount is determined.

What CO-253 means

The reduction is set by law rather than by the payer, applied uniformly, and calculated after coinsurance and deductible so it does not increase what the patient owes. There is no discretion in it and no determination to review. Attempting to bill the patient for the sequestered amount is prohibited, which makes the only correct handling posting it as a contractual adjustment.

Why CO-253 fires

  • A federal payment is subject to the statutory sequestration percentage.
  • The reduction applies to the payment after patient responsibility is calculated.
  • Medicare and certain federal programme payments carry it uniformly.

Is CO-253 worth appealing?

Rarely an appeal — usually a fix

There is nothing to appeal. It is statutory, applied uniformly, and the amount may not be billed to the patient — post it as a contractual adjustment and move on.

CO-253 — frequently asked

Can I bill the patient for the sequestered amount?
No. The reduction applies to the payment rather than to the patient's liability, and billing it to the member is not permitted.
Does it ever change?
The percentage is set by legislation and has been suspended and reinstated over time, but never by anything a provider can influence on a claim.

Related guides

CO-45 · Allowed amountCO-94 · Allowed amountPR-45 · Allowed amount

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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