My understanding when billing a screening colo where nothing is removed, 45378 would be billed for commercial insurance and G0121/G0105 is billed for Medicare/Medicare Advantage.

However; it has been suggested that ALL screening colo’s (where nothing is removed) should be billed with HCPSC codes. These are performed at the hospital as outpatient procedures.

Is this correct? Can you point me to the literature supporting this coding?

Thanks-