I don't know if TMS helps with PD but it might: Long-term treatment with transcranial pulsed electromagnetic fields improves movement speed and elevates cerebrospinal erythropoietin in PD healthunlocked.com/cure-par...
Some people were asking about availability and insurance and I stumbled across this today:
TMS can be used to treat depression, other things, and PD: brainsway.com/our-treatments/
And insurance might cover it for depression: brainsway.com/insurance/
So as a lot of PwP have depression, maybe depression is the diagnosis to get this paid for? You would want to make sure the treatment is basically the same for PD and depression.
And they have a Find a Provider page: brainsway.com/find-a-provider/