CO-249: Claim Identified as Readmission
CO-249 means your claim was reduced or denied as a readmission. Appeal with clinical documentation if the readmission was for an unrelated condition or was medically necessary.
What Does CO-249 Mean?
When paired with Group Code CO, the readmission payment reduction is a contractual adjustment. The provider absorbs the reduced payment and cannot transfer the cost to the patient. This is the standard and expected group code for CARC 249.
CARC 249 signals that the payer identified the hospital admission as a readmission — meaning the patient was readmitted within a defined window (typically 30 days) of a prior discharge. Under readmission reduction policies, the payer may reduce or deny payment for the second admission.
This code is most commonly associated with Medicare's Hospital Readmissions Reduction Program (HRRP), which penalizes hospitals with excess readmissions for specific conditions including heart failure, acute myocardial infarction, pneumonia, COPD, hip/knee replacement, and coronary artery bypass graft surgery. Commercial and Medicaid payers have also adopted similar readmission policies.
Not all readmissions are preventable or related to the initial stay. A readmission for a completely unrelated condition, an unavoidable complication, or a planned return should not trigger this reduction. The key to resolving CARC 249 is determining whether the readmission was genuinely related and preventable, or whether it should be treated as a distinct admission warranting separate payment.
Common Causes
| Cause | Frequency |
|---|---|
| Hospital readmission within 30 days of discharge The patient was readmitted to the hospital within 30 days of a prior discharge for the same or related condition, triggering the payer's readmission policy | Most Common |
| Medicare Hospital Readmissions Reduction Program (HRRP) penalty The hospital has excess readmissions for certain conditions (heart failure, AMI, pneumonia, COPD, hip/knee replacement, CABG) and Medicare applies a payment reduction | Most Common |
| Payer readmission policy triggered The commercial or Medicaid payer has a readmission policy that reduces or denies payment for readmissions within a specified timeframe | Common |
| Potentially preventable readmission identified The payer identified the readmission as potentially preventable based on clinical criteria, resulting in a payment reduction or denial | Common |
| Readmission for related condition The patient was readmitted for a condition related to the initial admission, and the payer considers it part of the original episode of care | Common |
How to Resolve
- Assess whether the readmission was preventable Review clinical records to determine if the readmission was related to the initial stay and whether it could have been prevented with different discharge planning.
- Verify the payer's readmission criteria Check the specific readmission window, targeted conditions, and exception criteria in the payer's policy.
- Compile supporting documentation Gather discharge summaries, clinical notes, and diagnostic records from both admissions showing the distinct nature of the conditions or the medical necessity of readmission.
- Submit a formal appeal File an appeal with comprehensive clinical documentation demonstrating the readmission was medically necessary, not preventable, or for an unrelated condition.
- Escalate to peer-to-peer review Request a peer-to-peer review with the payer's medical director if the initial appeal is unsuccessful.
- Accept or escalate further If the appeal and peer-to-peer review fail, accept the contractual adjustment or pursue further appeal levels if available.
Appeal with comprehensive clinical documentation demonstrating the readmission was medically necessary, not preventable, or for a condition unrelated to the original admission. Include discharge summaries from both admissions, clinical notes showing the distinct nature of the conditions, and any evidence that appropriate discharge planning was implemented. Reference the payer's specific readmission policy and demonstrate why the readmission does not meet their preventable readmission criteria.
Common RARC Pairings
The RARC code tells you exactly what triggered the CO-249:
| RARC | Description |
|---|---|
| N386 | This decision was based on a National Coverage Determination (NCD) or Local Coverage Determination (LCD). Review the payer's readmission policy and any applicable CMS readmission guidelines → |
| N381 | Alert: Consult your contractual agreement for restrictions, billing, and payment information. Review your contract for readmission policy terms, including the readmission window and applicable conditions → |
How to Prevent CO-249
- Implement comprehensive discharge planning to reduce preventable readmissions
- Ensure patients receive follow-up appointments within 7 days of discharge
- Provide thorough discharge instructions and medication reconciliation
- Implement transitional care programs for high-risk patients
- Coordinate with post-acute care providers to ensure continuity of care
- Track readmission rates and implement quality improvement initiatives for targeted conditions
- Engage patients and caregivers in self-management education before discharge
Also Filed As
The same CARC 249 may appear with different Group Codes:
Related Denial Codes
Sources
- https://x12.org/codes/claim-adjustment-reason-codes
- https://www.mdclarity.com/denial-code/249
- https://portal.ct.gov/-/media/ohs/health-it-advisory-council/apcd-advisory-group/data-submission-guide-workgroup/meeting-materials/6-30-22/carc-codes_final.pdf
- Codes maintained by X12. Visit x12.org for official definitions.