Congratulations to Oak Park. What a beautiful Immediate Care Center at 1000 Madison. The big plus is to have one of the finest doctors anyone could have. A.Z. Khan, MD, has been my doctor for 35 years and through those years he has saved my life many times. I am so proud to also have his son Usman Khan, MD, join him in his practice. This is my way of saying thank you for taking care of me and my entire family.