CO 253 Denial Code: Sequestration Reduction

Official CARC description: “Sequestration - reduction in federal payment.” Here’s what it actually means, why it fires, and how to get the claim paid.

Contractual Obligation (CO)Fix steps belowFree appeal letter draftNo PHI needed

What CO 253 actually means

The mandatory 2% federal budget cut on Medicare payments. Informational, expected, and permanent for now — the only “fix” is posting it correctly.

Liability group: CO = Contractual Obligation — the provider absorbs it — the amount cannot be billed to the patient. If the denial is wrong, the money is recovered by correcting or appealing the claim, not by balance-billing.

Why CO 253 fires

How to fix CO 253

1

Step 1

Post as a contractual adjustment to a dedicated sequestration code

2

Step 2

Never bill the patient for the sequestration amount

3

Step 3

Reconcile: it should be exactly 2% of the payer's payment portion

4

Step 4

No action needed beyond correct posting

Appeal it — or fix and resubmit?

Never appealable — it's federal law, not a payer decision. If the math is off (more than 2% of the paid amount), that's a reprocessing request, not an appeal.

Draft a CO 253 appeal letter now ↓

Draft the appeal letter

Fill in the denial facts — use placeholders, never real patient data (the letter keeps [PATIENT NAME]-style fields so you can merge real details privately). A payer-ready draft with an enclosure checklist comes back in ~20 seconds.

Your appeal letter draft will appear here.

Frequently asked questions

What does denial code CO 253 mean?

Sequestration - reduction in federal payment. In practice: The mandatory 2% federal budget cut on Medicare payments. Informational, expected, and permanent for now — the only “fix” is posting it correctly.

Is CO 253 the provider’s write-off or the patient’s responsibility?

CO stands for Contractual Obligation — the provider absorbs it — the amount cannot be billed to the patient. If the denial is wrong, the money is recovered by correcting or appealing the claim, not by balance-billing.

Can you appeal a CO 253 denial?

Never appealable — it's federal law, not a payer decision. If the math is off (more than 2% of the paid amount), that's a reprocessing request, not an appeal.

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