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Thread: Add on code

  1. #1

    Default Add on code

    AAPC: Back to School
    Can you use modifiers with add on codes such as 99135, (Anesthesia complicated by utilization of controlled hypotension)? I'm getting a lot of denials on this.

    Thank you

  2. #2


    This add on code and use of modifiers has been a query for me since long. All that I know is the add on codes should not be appended with Modifier 51 ( Mod- 51 exempt).

    I understand the Mod 50 also/ some -26 and so on..
    "But NO modifier at all concept" is not there; I am not sure of..
    Could any one come out with the correct guidance for this in a crystal clear way please?
    Last edited by preserene; 11-19-2010 at 02:50 PM.

  3. #3
    Join Date
    Apr 2007
    Kingsport, TN


    What type of modifier are you using with this code? For 99135, the use of modifier 51 is not allowed according to Appendix D in CPT, and in the Introduction section (of CPT) there is an explanation that NONE of the add-on codes are considered a multiiple procedure so you can't use the "multiple procedure" modifier. It would probably help to know what modifier is getting denied...

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