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Denial Codes

Medical billing denial codes A3, A21 and CO-16 explained for healthcare providers

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Understanding Claim Denial Codes: A3, A21 and CO-16 Explained

Understanding Claim Denial Codes: A3, A21 and CO-16 Explained

Rejected claims can stall your revenue cycle. Learn how to identify and fix common causes of A3, A21, and CO-16 denials—and prevent them from happening again.

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