I did an Ancestry DNA test and being adopted, it was the only way to find out who my birth father was. It turns out he gave a false name to my birth mother, and a false age, in fact he was totally unable to tell the truth, but my blood relatives did give me all the medical history I needed.
If it's medical history you need, you should pay for the test and get your first membership for free, then don't renew if you find what you want.
People change their names, addresses and lie about their age and parentage, so just going by name and location is unreliable.
