CPB Medical Billing Practice Questions - AAPC Certified Professional Biller Exam

A patient's insurance company denies a claim with reason code CO-4. What does this denial indicate?

The procedure code is inconsistent with the modifier used or a required modifier is missing The service is not covered under the patient's benefit plan The claim was submitted after the timely filing deadline The patient has not met the annual deductible

Correct Answer:

The procedure code is inconsistent with the modifier used or a required modifier is missing

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