Medical Billing Blog: Tips and Industry Updates
Our medical billing blog shares practical tips, coding changes and industry updates to help your practice get paid faster.
Written by our billing and credentialing team. Browse articles on denial management, A/R management, medical coding and credentialing.

What the CO 96 Denial Code Means and What to Do About It
The CO 96 denial code means the payer treated a charge as non-covered and will not pay it. Sometimes the service really is excluded from the plan. Other…
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What the CO 45 Denial Code Means and How to Handle It
The CO 45 denial code means the charge you billed was higher than the payer’s fee schedule, maximum…
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What the CO 22 Denial Code Means and How to Resolve It
The CO 22 denial code means the payer believes another insurance plan should pay this claim first. It…
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What the CO 4 Denial Code Means and How to Fix It
The CO 4 denial code means the payer found that the procedure code on a claim line does…
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What the CO 27 Denial Code Means and How to Respond
The CO 27 denial code means the payer says the patient’s coverage had ended before the date of…
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What the CO-16 Denial Code Means and How to Fix It
The CO 16 denial code means the payer could not process a claim because it lacks required information…
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CO-29 Denials: Why Claims Miss the Filing Limit and What to Do
The CO 29 denial code means the payer says the time limit for filing the claim has expired.…
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