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Thread: Lab 87400 mod 91 or 59

  1. #1

    Default Lab 87400 mod 91 or 59

    AAPC: Back to School
    Hi can anyone tell me if they do the influence lab test 87400 twice do they use the modifier 91 or 59 with second code - I've been told 59 - but thought 91 was for multiple lab tests.

    Thanks for any input

  2. #2
    Join Date
    Apr 2007
    Lincoln, NE


    -91 is the correct modifier. Here in Nebraksa we were getting denials because of a computer problem with one of the insurance carriers. Had to call and get it straight out.

  3. #3
    Join Date
    Apr 2007
    Minneapolis MN


    I agree, -91 is the correct modifier.

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