I was lucky enough to I get to do quite a few scalp blocks in residency - some for awake cranis, and some just to blunt the hemodynamics effects of pinning the head. I did do a supraorbital/supratrochlear and occipital at the request of neurology for a patient admitted for headache. The occipital lasted beyond the local effect but the supraorbital/supratrochlear didn’t.
Sphenopalatine is usually my go to for acute migraine. I do the occasional occipital block for occipital area headache, but not usually the other nerves. You find it to actually have benefit for chronic headache? What kind? Also, what do you bill for? Medicare will pay for occipital nerve blocks but private insurers don’t, at least in my area, and I’m not even sure about coding for the others.