Medicare rejection CO 26, 27 , 28 and CO 30 ,177 , 178, 180

co 26 , 27 & 28



Expenses incurred prior to coverage.
Expenses incurred after coverage terminated.
Coverage not in effect at the time the service was provided.

Check the eligibility through IVR and call patient for any other insurance information. If patient hasn't have any insurance. Bill patient.

CO 30, 177, 178 and 180

Payment adjusted because the patient has not met the required eligibility, spend down, waiting, or residency requirements.
Patient has not met the required eligibility requirements.
Patient has not met the required waiting requirements.
Patient has not met the required residency requirements.


This denial comes usually because of patient not submitting the required documents to Medicare. Call Medicare and find what document missing and ask the patient to update.


Medicare denial codes
Medicaid phone and address
Medical insurance billing
Medicare CO 4,5,20,21 AND CO 29
Medicare denial CO 26, CO 27, CO 28, CO 30, CO 177, CO 178 and CO 180

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