The ADA actually has its own version of Whistleblower protection. If you are advocating for someone who is disabled, and you are retaliated against on account of that advocacy, you too are entitled to certain protections. (Title V prohibits coercing or threatening retaliation against those who are disabled, or those attempting to aid people with disabilities in asserting their rights under the ADA.)
You no doubt realize this now, but you are correct that most people, let alone most docs aren't aware (and no doubt this applies also to docs sitting on medical boards, and probably even to most board counsel). I hope for all the best for you and your wife, who is so lucky to have you by her side, in every capacity.