Office Hours and Location

To schedule an appointment with the Biological Psychiatry Institute, please contact us at 602-279-1026.


  • Monday through Thursday between 8:00am and 3:00pm
  • Phone Operation times are as follows:
    • 9:00am-12:00pm
    • 1:30pm-3:00pm

* We do have an answering service.  Please listen to the whole recording and it will give you the option to leave a message.  If you are taking medications, you may experience side effects that you do not understand.  You may call during our regular office hours and leave a message for the doctor.  In most cases, the doctor will be able to relay instructions to you through the staff.  If that is not possible, you will need to schedule a phone appointment.  Please note: There is a charge for the phone appointments.  You can also email us here.



  1. Non-Urgent Calls: Leave a message and we will respond to the call on the next business day
  2. Urgent Calls: Dr. Williams will be paged (there is a charge of $150.00 for urgent/after hour calls)
  3. All emergencies are forwarded to 911 or referred to the Emergency Room



The office is closed for all national holidays, and will be closed for 1 week during Thanksgiving and 2 weeks between Christmas and New Years (dates may vary, please check with office staff for exact dates).


Biological Psychiatry Institute, LTD - (Map)
5133 N. Central Ave
Suite 107
Phoenix, AZ  85012