I tell like-minded people that I see a therapist. In the school I trained in it is expected that therapists seek their own personal therapy, so I am quite open about it with many colleagues, but I do not give ,y therapist's name. I've told his first name to very close relatives and friends and if they really, really wanted to, they could put two and two together and find him, since his contact info is readily available online - but they'd need to figure out his last name for that.