An Independent Medical Exam is not, in practice, an exam by a neutral third party you'd naturally trust the way you trust your own doctor. Under A.R.S. §23-1026(A), the Industrial Commission, your employer, or the insurance carrier can require a worker who may be entitled to compensation to submit to a medical examination "from time to time," at a place that's reasonably convenient. The exam is arranged and paid for by whichever party requested it, and the examining physician is selected by that party — usually the insurance carrier.
Scheduling isn't left entirely to the carrier's convenience. A.R.S. §23-1026(B) requires that the time and place be set with regard to your convenience and physical condition, and the statute now allows the exam to be conducted by telehealth if you consent to that format. Separately, Ariz. Admin. Code R20-5-114(A) requires the requesting party to serve you (or your attorney, if you have one) with written notice of the exam's time, date, place, and the examining physician's identity at least 15 days before the appointment.
You are not required to go into an IME alone if you don't want to. A.R.S. §23-1026(B) specifically allows you to have a physician present at the exam, as long as you procure and pay for that physician yourself. This can matter if you're concerned about how an exam is conducted or what gets documented, since your own doctor can observe firsthand rather than relying only on the IME physician's written report.
The statute itself is silent on whether you get a copy of the IME report — that gap is filled by Ariz. Admin. Code R20-5-114(D), which requires the carrier to provide you (or your authorized representative) with a copy of the report immediately upon receiving it. There's one narrow exception: if the exam concerns a mental condition and you're unrepresented, the report may go to your treating physician instead of directly to you.