St Louis and Columbia, MO are more than 100 miles apart you know.
If you are going to St Louis try contacting The LGBT Community Center 625 North Euclid Avenue #420, St. Louis, MO 63108 (314) 367-1166 for physicians.
If you are going to Columbia, MO try contacting University of Missouri's Lesbian, Gay, Bisexual, Transgender, Queer Resource Center Web site. Our doors are open from 8:00 - 5:00 at the Center for Social Justice in N214 Memorial Union phone 573-884-7750.
Hope that helps.
Jamie