I would call the insurance company and ask the question there.
You might call the group Associated Bodywork and Massage professionals and ask. I believe they insure some Reiki practitioners. Unlike someone who does personal training and group exercise Reiki and Tai chi are different in the sense that one is hands on or would be classified as body work, and the other is exercise instruction. You need to check for local rules on licensure as well as insurance.
Hello Eric Eyles,
Good for you; good luck with your studies. I would speak with the insurance company, also; you will probably be able to insure both with one policy. Here are some insurance choices:
Natalie aka NAPS 2 B Fit.