Contact Us Here you can find our address and email. Below is a contact form and below that is the link to schedule an appointment with Dr. Mahon. My address 3636 S. Geyer Rd. Suite #100 Sunset Hills, MO. 63127 Mail me michaelmahon72@yahoo.com Call me (314) 282-3621 Use The Form Below To Schedule Time With Dr. Mahon Please Use This Form To Send Us A Message Whether to make a comment, suggest a possible topic for Psych with Mike, or, book some time to talk with Dr. Mahon, we would love to hear from you. Please enable JavaScript in your browser to complete this form.Name *Email *Subject *Message *Let's Talk!