Category: Denial Codes

Denial code CO 45

Denial Code CO 45: Meaning, Causes, and Resolution Strategies

Key Takeaways: CO 45 = “Charge exceeds fee schedule/maximum allowable or contracted rate.” It usually represents a contractual adjustment, not a billable patient balance. Common causes include outdated fee schedules, incorrect coding, or missing modifiers. Prevention requires accurate contract management, claim scrubbing, and staff training. Partnering with Allzone helps healthcare providers streamline denial management and […]
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Medical claim denial code co15

Understanding Medical Claim Denial Code CO-15: Causes, Fixes, and Prevention

 Key Takeaways Denial Code CO-15 occurs when authorization or referral information is missing, invalid, or mismatched. Common causes include expired authorizations, incorrect provider details, or billing mismatches. Prevent CO-15 denials through automation, staff training, and proactive verification. Collaborating with a trusted RCM partner like Allzone Management Services can streamline your authorization process and reduce denials […]
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CO 109 Denial Code

CO 109 Denial Code Explained – Causes, Filing Rules & Prevention

In the complex world of medical billing, claim denials can significantly impact a provider’s cash flow, operational efficiency, and financial stability. One of the most common and often misunderstood denial codes is CO 109. This denial typically arises due to timely filing issues, which means the payer received the claim after the allowed submission deadline. […]
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co 197 Denial Code

Complete Guide to Handling CO‑197 Denials in Medical Billing

What is CO‑197? In medical claims terminology, CO 197 (or “CO‑197”) is a denial adjustment code used by payers to indicate that a claim (or line item) was rejected because precertification, authorization, or required notification was not obtained prior to providing the service. The “CO” stands for Contractual Obligation — meaning this denial is tied […]
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