CO-42 Denial Code Explained
CO-42 is a medical billing denial code that indicates the charges exceed the allowable amount under the patient’s insurance plan or payer contract. This denial commonly occurs when billed amounts surpass payer reimbursement limitations.
DENIAL CODE
3/7/20221 min read
CO-42 Denial Code Explained
CO-42 is a medical billing denial code that indicates the charges exceed the allowable amount under the patient’s insurance plan or payer contract. This denial commonly occurs when billed amounts surpass payer reimbursement limitations.
What Does CO-42 Mean?
The CO-42 denial code means the insurance payer adjusted or denied the claim because the billed charges exceeded the allowable reimbursement amount.
This denial is often related to contractual fee schedules or payer reimbursement limitations.
Common Reasons for CO-42
Charges exceed payer fee schedule
Incorrect billing amounts
Contractual reimbursement limitations
Outdated charge structures
Duplicate billing adjustments
Payer pricing restrictions
How To Fix CO-42
Review the payer explanation of benefits (EOB) and compare the billed charges with contracted reimbursement rates. Verify claim accuracy and confirm whether the adjustment is contractual or requires correction.
In many cases, CO-42 is considered a contractual adjustment rather than a billing error.
Related Denial Codes
You may also encounter:
Quick Summary
CO-42 indicates the billed charges exceeded payer reimbursement limitations. Most denials are related to contractual adjustments or fee schedule restrictions.
Medical billing denial codes, insurance prefixes, and claim guidance in one searchable resource hub.
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