Contact Us

To request an appointment, please call our office at 877.559.0001 and leave a brief message on our secure voicemail stating your location preference (Deerfield, Chicago, or Oak Brook) preferred therapist (if known), and best number to reach you. You may also submit a request via the contact form below. We will get back to you shortly, always within 1 business day, to schedule your appointment

We are committed to your privacy. Do not include confidential or private information regarding your health condition in this form.

Please note that we are an out of network provider, and do not contract with any insurance carrier. For more information, click here: ATC – Insurance Information

Northern Suburbs

707 Lake Cook Road, Suite 310
Deerfield, IL 60015
Map & Directions

We are located on the 3rd floor. Restrooms are located on either side of the elevators. Proceed down the hall to Suite 310.


656 W. Randolph, Suite 4W
Chicago, IL 60661
Map & Directions

NOTE: Please be aware that some smart phone maps do not properly direct you to our office. We are located on Randolph, between I94 and Des Plaines Street.

We are located on the 4th floor. Take the elevator up to 4W (not 4E). Have a seat in the waiting area outside the elevators and your therapist will greet you shortly.


Western Suburbs

1550 Spring Road, Suite 220
Oak Brook, IL 60523
Map & Directions

Our office is located on the second floor. Additional parking is available in the back.

  • Interested in making an appointment?

    Call us at 877.559.0001 or


  • Testimonials

    Susan Richman, J.D., Co-founder, Honorary Chair and Board Member, Beyond OCD

    Dr. Cassiday changed my life.  She took me on “field trips” to wherever was necessary to deal with my OCD triggers. She never hesitated to get down in the trenches with me and teach me new ways to respond. She was truly a partner in my healing.  We laughed a lot together, so what could Continue Reading

    View all Testimonials
  • Practice News

    View all Practice News
  • Twitter

    Study casts doubt on ketamine nasal sprays for depression -

    Autism Reversed In Only In 3 Days. Effects May Last Years.: - via:@psyblog #overcomeautism

    How Young Is Too Young for Protest? A National Gun-Violence Walkout Tests Schools - The New York Times

    Follow Us on Twitter