I need help understanding how to appropriately bill Neurophysiology.

The 95920, 95926,95925, & 95861 are being performed in our ASC by a neurologist while our Pain management physician places spinal cord stims leads.

Please help me understand how this should be billed. Should I bill for both the Professional and the Facility fee?, if so should the place of service be 24? And for the professional fee, should the provider reading the results bills too? And should he use the POS of the ASC even though he is not on site there? I am assuming he is billing it as the same codes with a 26 modifier. I am still very unclear as to how to bill the facility portion of this.

I have been racking my brian out trying to find out how to bill this appropriately. Any help would be greatly appreciated!