Southern Illinois Associates LLC

SIA LLC psychiatry and psychology services emphasize assessment, treatment and management of physiological and psychological health. Our psychiatric staff provides a full range of services for adults.

Get Well Behavioral Health Clinic

Southern Illinois Associates, is a psychiatric practice serving since 2004. Our providers treat common and serious mental health conditions like major depression, bipolar disorder, anxiety disorders, psychotic disorders, dementia, ADHD and other disorders

Our mission is to offer superior quality behavioral healthcare that patients recommend to their family and friends, physicians prefer for their patients. Helping our community one person at a time

Dr. Nigam

Medication Management

We treat depression, anxiety, ADHD, bipolar disorder, OCD, grief, PTSD, trauma, and more. If you are struggling with any of these conditions, please reach out.


For many people, psychotherapy combined with medication works best. It can help identify underlying concerns that may be adding to your depression.


Transcranial Magnetic Stimulation

We are Gold provider for Neurostar rTMS. Neurostar uses Transcranial magnetic stimulaton (rTMS) to target key areas of the brain that are underactive in people with depression. 

Opioid Addiction Treatment

We provide buperinorphine/naloxone treatment for opioid addiction


As covid restrictions are being lifted, Tele-psychiatry is available only for sick and immunocompromised people. Please contact office about our policy.

Esketamine Treatment

it  is a prescription medicine, used along with an antidepressant taken by mouth, for treatment-resistant depression (TRD) in adults. 

Sanjay K Nigam, M.D

I founded Southern Illinios Associates in 2004. I want to promote positive mental health, improve acess to care to patient. I believe in indiviualized care and our mission is “Helping our Community, one person at a time”

I’d Love to Help

We Have Experience With…

Medication Management

We treat depression, anxiety, ADHD, bipolar disorder, OCD, Grief, PTSD, trauma, and more. We would like to help you achieve a balanced state of mental health.

Treatment Resistant Depression

If you have been suffering from depression which is not improving, you might have treatment resistant depression. We proivde TMS and spravato Treatment.

Transcranial Stimulation Therapy

Neurostar TMS is non invasive FDA approved treatment for  treatment resistant depepression. We have two TMS machine and trained operators to help you.

Spravato / Esketamine Treatment

SPRAVATO® is a non-competitive N-methyl D-aspartate (NMDA) receptor antagonist indicated, in conjunction with an oral antidepressant, for the treatment of:

• Treatment-resistant depression (TRD) in adults.
• Depressive symptoms in adults with major depressive disorder (MDD) with
acute suicidal ideation or behavior.


Psychological counseling (psychotherapy) by a psychiatrist, psychologist or other mental health professional can be very effective. For many people, psychotherapy combined with medication works best. It can help identify underlying concerns that may be adding to your depression

Recent Post and Updates

Update on New Virtual Check In

Update on check in and intake processwe are in process of updating and introducing new virtual checkin. Starting from Monday Feb 8th, 2021, we are going to start testing virtual check in and a new telehealth portal.  Once you arrive at office, you will get an email...

SIA Behavioral Health

The SIA Behavioral Health App is a convenient and secure way to connect with your Southern Illinois Associates, LLC, Behavioral health care team. This app provides a great all-in-one experience to help save our patients time while also allowing us to better serve you and your family. By downloading and registering for the app, you will be able to.

  •  Complete and sign forms, upload insurance cards, etc. prior to your appointment with the virtual check-in.
  • Fill out health history, health questionnaires, etc. prior to appointment
  • Fill out screening questionnaires
  • Pay co-pays & due balances
  • Schedule appointments
  • Easily connect to your scheduled TeleHealth visits
  • Participate in Remote Patient Monitoring Programs




Download today to help create an added ease and convenience for your healthcare experience.

In case of an emergency, call 911 or report to the nearest emergency room.

Get In Touch






16 Junction Drive W, Ste 2,

Glen Carbon, IL 62034


Mon - Fri: 8:30 Am to 5 PM

2nd Saturday of every month:

From: 8:30 AM to 2 PM

Patient portal