The Erectile Dysfunction Experts. The Horn Clinic is led by Nathaniel Horn, M.D., a respected specialist in the area of men's sexual health. We conveniently located in Matteson, IL, a south suburb of Chicago, and welcome you to our comfortable, inviting office. The Clinic is a men's health and wellness facility, specializing in a variety of health issues We focus on these areas: • Erectile dysfunction • Premature ejaculation • Low testosterone • Sexual therapy for couples The office is designed to provide privacy and confidentiality in a relaxing environment and is accessible via many major highways. There is plenty of free parking and the clinic is adjacent to a number of hotels for it's out of town clients. Don't waste another second. Call The Horn Clinic for your free consultation today!