CO-16

Avoiding/Correcting This Error This rejection is the result of submitting a CPT/HCPCS code without a required modifier. You are required to research the proper modifier to report with the CPT/HCPCS code then submit a new claim. Please use [...]

CO-22

Avoiding/Correcting This Error During patient registration it’s important for office staff to identify whether a beneficiary’s claims should be covered by other insurance before, or in addition to, Medicare. Providers shall use [...]

OA-18

Avoiding/Correcting This Error A duplicate claim submission occurs when a provider resubmits a claim either on paper or electronically for a single encounter and the service is provided by the same provider to the: same beneficiary; for the [...]

CMS FQHC Booklet