Question:

We recently had a surgeon merge his practice with ours. Can I bill his patients as new (99201-99205) when they are seeing the same physician but he has joined/merged with our practice? We will be billing using our tax ID/NPI number. They have seen him previously under his old tax ID/NPI.

Answer:

Even under a new tax ID number, once the practices have merged, any patients seen by the new physician(s) within the past 3 years will be established patients to the new physician and all physicians of the same specialty in the newly merged practice.