As this is a private pay model, OHIP billing codes are not involved at all?

Correct, there are no OHIP billings applicable to this circumstance. Virtual PA services are not insured services under OHIP. Subsequent interactions could be under the new OHIP rates at the physician's discretion. It is unlikely OHIP will accept these visits as establishing a longitudinal relationship to qualify for full remuneration.*

Please note, as these patients are paying privately, please do not submit this as a claim through your governing body