I code in Virginia and for our Medicaid, there is no incident to billing for PA's, only for Medicare (and Aetna, and Coventry). Sometimes there is confusion because in Virginia (not sure of other states) PA's are not credentialed with Medicaid if primary, only for crossover claims from Medicare. We bill the PA under the supervising physicain's NPI which is what is done for incident to billing, hence the confusion.
Did you ever get a clear answer for this? I'm trying to figure out the same thing.Thank you all for your information, just want to add that is for Texas medicaid.