I haven't had any problems billing those two codes together 97140 and 97110 seems to be ok. But 97530 and 97140 together, they'll deny everytime, and 97530 with 97116 also deny. But supposedly if you use modifier 59 it might be ok. I read that in the coding forum today.
I've billing for OT, PT and ST several years, but seldom use modifiers. We just try and stay away from cetain code combos, but maybe I should be using them. Wish I had some definite rules on when to use them and for which codes. Anyone know a website where I could read more about them?