As of 2010 Medicare requires the use of G0434 for low-moderate complexity (cups/strips) and G0431 for high complexity (analyzer), each can only be billed with 1 unit, regardless of how many classes are screened. The G0434 allows approx $20 and the G0431 approx $100, depending on the MAC/FI.
QW modifier is used to indicate the test was CLIA waived.
Some Medicaid and WC carriers have followed MDCRs lead and are requiring these HCPCS also, varies from state to state. These can be confirmed on the MDCD/WC websites through their fee schedules and/or medical policies.
Commercial carriers as of right now are accepting the CPT codes of either ; 80101 (qualitative single class) or 80104 (qualitative multiple class, per procedure).
Which are accepted and how they will allow you to bill, are individually determined.
It is never a good idea to "hit or miss" claims. That sends red flags to carriers that best practices are not being followed. The idea is to get your claims out "clean" the first time. That will require research and due dillignece with each of your major carriers, maintaining up to date policies and staying on top of any upcoming changes. Initially, that all takes time to get it down pat, but the payoff in the long run is well worth it. Quick turn arounds from claim release date to payment, which equals low A/R, happy physicians/clinicians, and you as a valuable, well regarded, well compensated, employee....