CO-249: Claim Identified as Readmission

What Does CO-249 Mean?

CO-249 is a contractual adjustment indicating the payer has reduced or denied payment because the admission was identified as a readmission under the payer's readmission reduction program. The provider absorbs the financial impact and cannot bill the patient for the reduced amount. For Medicare, this may be part of the hospital-wide HRRP penalty rather than a claim-specific adjustment.

CARC 249 fires when a payer's adjudication system identifies an inpatient admission as a readmission — typically within 30 days of a prior discharge for the same or a clinically related condition. The payer applies a payment reduction or full denial under its readmission reduction policy. For Medicare, this falls under the Hospital Readmissions Reduction Program (HRRP), which penalizes hospitals with excess readmission rates for specific conditions including heart failure, pneumonia, COPD, hip/knee replacement, CABG, and acute myocardial infarction.

The financial impact can be substantial. Medicare's HRRP applies a hospital-wide payment reduction based on aggregate readmission rates rather than adjusting individual claims, meaning the penalty affects all Medicare payments, not just the readmitted claim. Commercial payers may apply claim-level denials or payment reductions for readmissions that their utilization review determines were preventable.

CARC 249 appears with Group Code CO, making the readmission reduction a contractual write-off that the provider absorbs. The key determination is whether the readmission was truly related to the index admission and whether it was preventable. Readmissions for unrelated conditions or unavoidable clinical deterioration are appropriate candidates for appeal with strong clinical documentation from both the index admission and the readmission.

Common Causes

How to Resolve

Determine whether the readmission was clinically related and preventable, then either appeal with documentation or write off the reduction.

1. Identify the readmission policy Determine whether the reduction is from Medicare HRRP (hospital-level aggregate penalty), a commercial payer's claim-level readmission policy, or a state Medicaid readmission program. The appeal strategy differs for each.
2. Review both admissions Pull medical records for the index admission and the readmission. Focus on discharge planning documentation, the readmission diagnosis, and whether the clinical circumstances were related to the original stay.
3. Document unrelated conditions If the readmission was for an unrelated condition, compile clinical evidence showing distinct diagnoses, different organ systems, new acute events, or conditions that could not have been anticipated at discharge.
4. Demonstrate unavoidable readmission If the readmission was related but unavoidable, document that appropriate discharge planning occurred — discharge instructions were provided and understood, follow-up was arranged, medications were reconciled, and the readmission resulted from an unpredictable clinical deterioration.
5. Submit appeal with full documentation File the appeal with medical records from both admissions, a clinical narrative explaining why the readmission was unrelated or unavoidable, discharge planning documentation, and any payer-specific appeal forms.
6. Post write-off if applicable If the readmission was preventable and the reduction is contractually valid, post the CO-249 adjustment. Flag the case for clinical quality review to inform readmission reduction initiatives.

Common RARC Pairings

The RARC code tells you exactly what triggered the CO-249:

How to Prevent CO-249

• Implement comprehensive discharge planning with detailed patient education, medication reconciliation, and confirmed follow-up appointments
• Develop care transition programs including post-discharge phone calls within 48 hours, home health referrals for high-risk patients, and bridging clinic visits
• Use predictive analytics to identify patients at high risk for readmission and deploy targeted interventions before and after discharge
• Ensure thorough documentation of discharge instructions, patient understanding (teach-back), and follow-up care plans in the medical record
• Coordinate with post-acute care providers and primary care physicians to ensure seamless transitions and appropriate follow-up
• Track readmission rates by condition, provider, and payer to identify patterns and implement targeted quality improvement
• Engage patients and families in discharge planning, ensuring they understand medications, warning signs, and when to seek emergency care versus calling the physician

General Prevention

• Implement comprehensive discharge planning with detailed patient education, medication reconciliation, and scheduled follow-up appointments before discharge
• Develop care transition programs that include post-discharge phone calls, home health referrals, and bridging clinics to reduce preventable readmissions
• Use predictive analytics to identify high-risk patients for readmission and deploy targeted interventions before and after discharge
• Ensure thorough documentation of discharge instructions, patient understanding, and follow-up care plans in the medical record
• Coordinate with post-acute care providers to ensure seamless care transitions and appropriate level of care upon discharge
• Track readmission rates by condition, provider, and payer to identify patterns and implement targeted quality improvement initiatives
• Engage patients and families in discharge planning, including teach-back methods to verify understanding of medications, warning signs, and when to seek emergency care

Related Denial Codes