I am re-porting this in hopes that the OP can openly name the major healthcare provider.
Some people have an exaggerated sense of how exposed their identity is.
Officer on phone: "Are you male or female?"
Paranoid on other end of conversation: "I don't want to say."
Officer: "Come on, it's just your sex. What can I possibly do with that?"
Paranoid: "I don't know, but I'm afraid to give out anything that might identify me."
Officer: "How could your sex, male or female, identify you?"
Paranoid: "Ok, I guess you're right. I'm male."
Officer: "Oooooh, I got you now! You're John Harrington, aren't you! John Harrington of Toledo, OH. You live on 428 E. 19th St. I'm coming for you right now, you son of a bitch!"
Paranoid: "shit!" *hangs up phone and runs away*
See how ridiculous that scenario is?