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CO-69 Denial Code: Day Outlier Amount

CARC 69 reports a day outlier amount: an adjustment on an inpatient claim linked to a length of stay beyond the payer's threshold for the case type. It usually appears on institutional remittances and can increase payment. It's informational, not a denial.

Quick facts

Code
CO-69 (CARC 69)
Status
Active In use since January 1, 1995.
Code set
Claim Adjustment Reason Codes (CARC)
Group codes
  • CO (Contractual Obligation): The usual group. The adjustment is part of the contractual payment calculation and isn't billed to the patient.
  • OA (Other Adjustment): Some payers report outlier amounts under OA as other adjustments that don't assign responsibility to either party.
Official description
Day outlier amount.
X12 Claim Adjustment Reason Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What CARC 69 means

CARC 69 reports a day outlier amount. Many inpatient payment methods pay a fixed amount per case, such as a DRG rate. When a stay runs much longer than the typical length for that case type, some methodologies add a day outlier payment, or adjust the case payment, to account for the extra days. The payer reports that piece of the calculation with CARC 69.

This code appears on institutional (facility) remittances. It isn’t a denial. Depending on how the payer reports it, the amount can increase payment (often shown as a negative adjustment on the 835) or represent a limit applied to the outlier.

Medicare’s inpatient prospective payment system has generally moved to cost-based outliers (CARC 70). Day outlier provisions are more likely to show up under certain Medicaid methodologies and commercial contracts.

Common causes

  • Long inpatient stay exceeding the payer’s day threshold for the DRG or case type.
  • Contract terms that include per-diem payments after an outlier threshold.
  • Outlier limits reached for the period (N523), reducing the outlier payment.
  • Non-covered days inside the stay, which can reduce the days counted toward the outlier.

How to check it

  1. Confirm the length of stay and covered days on the claim.
  2. Find the outlier terms in your contract or the payer’s published methodology.
  3. Recalculate the expected outlier and compare it to the ERA.
  4. Check for non-covered days or days denied on review that reduced the outlier.
  5. Request reprocessing or file a payment dispute if the calculation doesn’t match the terms.

How to prevent problems

  • Model outlier terms in your contract management system so expected payments include them.
  • Document medical necessity for each day of long stays, since denied days reduce outlier payments.
  • Review outlier claims separately. An ERA Analyzer can surface CARC 69 amounts for comparison with expected payments.

Specialty notes

Hospitals with long-stay populations, such as psychiatric, rehabilitation, and neonatal intensive care units, are most affected, particularly under Medicaid or commercial contracts that use day-based outlier terms.

Remark codes that may appear with CO-69

  • N523 (The limitation on outlier payments defined by this payer for this service period has been met.): The payer's limit on outlier payments for the period has been met, so the outlier payment was reduced or not made.
  • CO-70 (Cost outlier - Adjustment to compensate for additional costs.): A cost outlier, based on unusually high costs rather than long stays.
  • CO-A5 (Medicare Claim PPS Capital Cost Outlier Amount.): A capital cost outlier amount under Medicare PPS.
  • CO-78 (Non-Covered days/Room charge adjustment.): Non-covered days or room charge adjustment, which can reduce payment on long stays.
  • CO-45 (Charge exceeds fee schedule/maximum allowable or contracted/legislated fee arrangement.): The standard contractual reduction to the allowed amount.

CO-69 FAQ

What is a day outlier?

A payment provision for inpatient stays much longer than typical for the case type. Instead of paying only the standard case rate, the payer adds or adjusts an amount based on the extra days, according to its methodology.

Does Medicare still use day outliers?

Medicare's inpatient prospective payment system now generally relies on cost outliers rather than day outliers. Day-based outlier provisions still appear in some Medicaid programs and commercial contracts.

Why is the CARC 69 amount negative?

On an 835, a negative adjustment amount increases payment. An outlier that adds to reimbursement is often shown that way.

Can I bill the patient for a day outlier adjustment?

No. Outlier amounts are part of the facility's payment calculation with the payer, not patient cost-sharing.