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CO-151
Recoverability: Medium
Payment adjusted because the information submitted does not support this many/frequency of services
The payer says the quantity or frequency billed exceeds what the plan allows or what the documentation supports. Dental plans are dense with frequency limits, so this code does heavy lifting on dental remittances.
Why this happens on dental claims
- Frequency limits hit on prophylaxis (commonly two per year), full mouth series (every three to five years), bitewings, and periodontal maintenance intervals
- Prosthetic replacement rules denying crowns, bridges, or dentures replaced within five to seven years of the prior one, including missing tooth clause reviews on replacement prosthetics
- Payer history errors counting another office's imaging, or a predetermination, as a completed service
How to appeal CO-151
- Get the payer's service history for the code: which dates and providers they counted toward the frequency
- Verify their history, since prior services from other offices and services charted but never completed are common counting errors
- For replacement denials, document why replacement was necessary within the interval, such as fracture or non-restorability, and appeal with imaging
- Cite the plan's exact frequency language when your dates fall outside the limitation
- If the limit legitimately applies, bill the patient where the plan and your participation agreement allow
How to prevent it
- Pull frequency histories and last-service dates during eligibility verification for imaging, prophylaxis, periodontal maintenance, and prosthetics
- Document prior prosthetic seat dates and failure reasons before replacement work begins
Related codes
How much CO-151 money is sitting in your remittances?
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