I am trying to provide cost data to an attorney relative to his patient. I am a Medical consultant.
I'm not sure what you mean by the same category. Both the TENS unit and the OrthoStim3 are forms of electrotherapy, but the OrthoStim3 has a lot more features than the TENS. I can't find a price on the OrthoStim3, but I suspect it's significantly more expensive than the TENS unit based on what it does. I'd suggest you contact the company VQ OrthoCare if you need prices on the two units. Here are links to the two units on their Web site:
TENS unit: http://www.vqorthocare.com/Products/Electrotherapy/BioTens.php