The information is very, very easy to come by. There are clearing houses to which all claims are electronically submitted and then electronically transferred to insurance carriers based on that carrier’s electronic payor number. All information has become very standardized - patient, date of birth, ID number, address, name and date of birth of the insured, diagnosis code, procedure code, and providers NPI number which will lead you to the demographic and tax information on the provider themselves.
Major insurance carriers are now doing EFT’s (Electronic Funds Transfers) of all money to providers so they have access to the doctor’s bank name and account number.
This all started under Clinton with HIPAA and sold under the guise of protecting the confidentiality of patient’s health records.
All meds also have an assigned corresponding code number. Although not yet mandated, at some point in time doctors will also have to include the code numbers of all the meds their patient is taking when they bill Medicare. There is no reason to believe that this will not also be required for commercial insurance.
I work in this area every day. You would be amazed at how easy it is or will be to gain access to this information.
None of that is new to me (as I said, worked in IT all my life and have always followed medicine due to my early career in neuropsychology).
I still don’t see the proof or even evidence IRS is going to access health records, nor what the point of that would be.