What should I do about my friend's mom that tells patients' business?

I’ve been friends with my friend since I was in 4th grade so that’s almost 11 years. We are pretty close, and I’ve recently learned that her mother tells her everything that goes on in the hospital when she recognizes people she knows. Her mom is a radiographer/sonographer.

My friend asked me, “Is it true your sister got liposuction?” She got the information wrong but it did have to do with surgery about her stomach. She told me her mom tells her everything and I told her that was wrong. She also told me about our friend that went to the hospital because “down there” hurted.

I’m scared to go to the hospital for any reason now because I know she’ll tell her daughter (my friend). Her family is also struggling so I can’t let her lose her job but how can I make sure she won’t tell people’s business? She could easily tell her daughter and make sure she doesn’t tell me.