CO-151: Payment Adjusted — Information Does Not Support Level of Service (Downcoding)
Information submitted does not support the billed level of service
1. What Does Denial Code CO-151 Mean?
Payer downcoded an Evaluation and Management (E/M) service (e.g. paying 99213 instead of billed 99214) asserting medical complexity or time in clinical records did not justify the higher level.
2. Top Root Causes for CO-151
Most CO-151 rejections trace back to one of the following billing or clinical discrepancies:
3. Resolution Checklist for CO-151
Interactive ChecklistStep through these concrete audit items before submitting a corrected claim or filing a formal appeal:
4. Appeal Strategy & Letter Template
E/M downcoding appeals have a 65%+ success rate when structured with an MDM grid mapping the clinical notes directly to AMA criteria.
RE: Appeal of E/M Downcoding (CO-151) Patient: [Patient Name] | DOS: [DOS] | Billed: 99214 | Paid: 99213 We write to appeal the downcoding of CPT 99214 to 99213 for DOS [DOS]. Under AMA CPT 2021/2023 Guidelines, this encounter qualifies as Moderate Medical Decision Making based on: 1) Number of Problems: 1 chronic illness with acute exacerbation; 2) Risk: Prescription drug management ([Medication Name] adjusted). Attached chart highlights substantiate 99214.
Rather than reacting to CO-151 on post-adjudication 835 ERAs weeks after service, ClaimCure's pre-submission 4-bucket scrubber audits claims in real-time before electronic dispatch:
- Utilize EHR clinical decision support to ensure all MDM elements are captured before closing encounter
Get the CO-151 Resolution Kit
Download our customized appeal checklist, CMS citation references, and payer timely filing matrix for CO-151.
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