Workers compensation claim, under TN law is the case manager required to attend my doctors visit, my rights under HIPPA laws

Call the TN Dept of Workers Comp. There are more restrictions on nurse case managers than you might think. They can come to the office, but if you don't want them in the exam room, they must remain in the waiting area. You also have the right to schedule your own appointments as long as it's within the time frame of what the Dr request. I know because I have an injury myself and I've spent 3 times for more than an hr on the phone with the State of TN, and I've also consulted an attorney. Just do what the Dr tells you to do, and tell the case manager that she/he will need to be at the appointments at a time of day when it's convenient for you, so as long as you don't put them off and stall.