Billing for PTA

I was trying to submit billing for PT assistant service, billing manager requires that a NPI number be put in. But PT assistants do not have NPI numbers. What can I use in place of NPI numbers? And is the GPCQ the right modifier to use for assistants?
In the fee sheet i have entered both the rendering provider (the PTA) and the supervising provider (the PT) but the X12 generation is not using the NPI of the supervising provider, but is erroring out saying that no NPI exists.
Please advise.

Hello @rdb
What credential does your insurance company accept for PTAs?
You might try putting that in the PTA’s user profile (Admin/ user) space for the NPI which is where the billing mgr gets the data.

I’m not a billing pro but it’s possible they want something in the provider’s insurance numbers (admin/ practice/ practice settings.

Just a couple guesses…
Best- Harley