I need help. I am needing to know when G0481 can be billed vs G0659. I have a bill that isn’t specific on the kind of test that was done, other than it was definitive. How do I know which one to use? I understand that G0659 is without Method or drug-specific calibration etc. but the bill doesn’t state those specifics. I cannot find anything anywhere. Help please?!

Thank you in advance