Being a doctor myself, I am going to share an approach with you. There are some wonderful medical schools there in Chicago, the one at the University of Chicago (Pritzker School of Medicine) being only one of them. Any of these medical school will advise you on locating a specialist in bio-identical hormone work. There may also be specialists, with other names, such as internists, surgeons, etc., that do excellent work in the field that you are seeking help from. This is how I would approach the problem. Chicago is a great community and one can find just about kind of doctor that one needs there. You are going to have to do a little work, "beating the bushes" to find the doctor that you are looking for. Good luck in your search, that you will find him or her soon.