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Thread: Modifier 33

  1. #1
    Join Date
    Apr 2007
    Cape Girardeau

    Default Modifier 33

    AAPC: Back to School
    I have little info on modifier 33. Anyone know if it needs to be added on 99381-99385 and 99391-99395 and immunizations? Thanks!
    Penny Smith, CPC

  2. #2
    Join Date
    Apr 2007


    No it does not. If the service is inherently routine then there is no need for the mod 33. Hope that helps.

  3. #3
    Join Date
    Apr 2007
    Lubbock, TX


    Quote Originally Posted by penny70 View Post
    I have little info on modifier 33. Anyone know if it needs to be added on 99381-99385 and 99391-99395 and immunizations? Thanks!
    Nope - if the word "Preventive", 'vaccine', or 'immunization' in the description, don't add the 33 modifier. You'd use the 33 modifier for codes that could be used for preventive screenings, or diagnostic services - such as 93000 (EKG).

  4. #4

    Default 33 with well / sick visit

    should I use the modifier 33 on the well code or the sick ?

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