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GO434 vs G0431

  1. Question GO434 vs G0431
    Medical Coding Books
    We have a moderate complex lab and we are using an assay machine to do qualitative urine drug screens. We do 12 test and one validity test. We would like to know, because we are using an assay machine is this considered moderate or high complex testing and what is the appropriate code G0431 or G0434? Thank you!! Any help is greatly appreciated.

  2. #2
    Location
    St. Joseph County, Indiana
    Posts
    101
    Default
    The answer is...the machine does not determine whether you bill G0431 or G0434, its your level of complexity. You can only bill the G0434 for ONE UNIT as moderately complex. Note: Is probably not worth - between the staff and the reagents, it probably costs you $20 to run the test and Medicare only pays about $16.

    If you go to highly complex then you can use the G0431 x number of classes.

    Brock Berta, CPC-A, MBA
    Billing Czar

  3. #3
    Location
    Denver Colorado
    Posts
    279
    Default
    Actually, G0431 can also only be billed with a maximum of 1 unit of service

  4. #4
    Location
    St. Joseph County, Indiana
    Posts
    101
    Default
    Oops. You are right. In 2011, they made the code "per encounter" but upped the fee schedule to a base of $102..depending on the state.

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