I have DBS installed, there are at least two target locations for the electrodes. My electrodes are positioned at the STN, Sub Thalamic Nucleus. This position is for control of motor symptoms. I am still taking some meds, 1/3 of pre DBS level, because DBS cannot, as I understand it, directly influence non motor symptoms.
That said the massive boost in confidence that DBS has given me has reduced the duration and intensity of any periods of anxiety. I didn't suffer really badly with anxiety but enough to be glad I'm where I am now.