I have, and I recommend you do so. It seems to me health professionals may hesitate to contact their client or participants’ doctors for fear of looking unqualified– thinking their client may think they don’t know what they are doing so have to ask someone else for help. In my experience, this was never the case. I would tell the person I wanted to talk to their doctor to see how I could help them as safely and effectively as possible. The clients always viewed this as taking extra time and effort to help them, and were always grateful for the extra service. In fact, multiple times when I called doctors for this reason, the doctors were so impressed with my level of professionalism (not the opposite!) they asked me to come into their office, meet with them, and leave business cards for other patients! You are doing an extra service, as I mentioned, and your clients will appreciate it. It will also help you minimize your risk, and in that regard, I say it’s always better to be safe than sorry. Good luck with the client! Perhaps he or she may present a new challenge to you, which will help you grow your own skills!