TMPPM 2010 > Volume 1, General Information > Section 6: Claims Filing > TMHP Electronic Claims Submission > Modifier Requirements for TOS Assignment > Anesthesia Anesthesia

For anesthesia procedures, use one of the following modifiers: AA, AD, QK, QS, QX, QY, and QZ. Using these modifiers results in TOS 7 being assigned to the procedure.

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