We are Committed to Your Health

SIA-LLC is a psychiatric practice serving Glen Carbon, IL and its surrounding area since 2004. Our providers treat common and serious mental health conditions like major depression, bipolar disorder, anxiety disorders, psychotic disorders, dementia and dementia-related problems.

We are committed to your health. With recent Covid-19 (corona virus) issues, we are offering Telemedicine appointments to our patients. 

Our staff and provider is committed to your health, if you are not able to come to office because of illness than contact our office to arrange a video call. These appointments have limited availability. 

Connect us at https://siallc.doxy.me/


Coordinate by calling our office


For Appointments:

Call: 6182885019

Our Services


We provide treatment for Mood disorder, Anxiety disorder, PTSD, ADHD, Dementia among other psychiatric disorders


Transcranial Magnetic Stimulation Therapy is one of the most Technologically advanced depression treatments available.

Medication Assisted Treatment for Opioid Addiction Recovery Program

We have been providing Medication Assisted Treatment for opioid addiction.


we provide individual, group, and family therapy services to address issues such as depression, anxiety, stress reduction, and family system issues.

Esketamine Therapy.

Our clinic now offer Estkeamine treatment for Severe depression, which is not responding to treatment. 


The Patient Portal is an online communication link between patients and their providers. Equipped with a secure username and password, you gain anytime access to your Medical Health Records 24×7.

Helping Our Community,  One Person at A Time

Southern Illinois Associates, LLC have been providing psychiatric services to Glen Carbon and surrounding area since 2004.

Dr Sanjay K Nigam founded Southern Illinois Associates to bring psychiatric help to Madison and surrounding counties. He believes in helping our community one person at a time.  The practice now have a team of board certified psychiatrist, nurse practitioners, and social workers.

Meet Our team

Team of Southern Illinois Associates, has been providing psychiatric or mental heath treatment at our Glen Carbon physician office. Our team also provide treatment at several of nursing homes, memory care units, and assisted living in the area.


Jaime Mendoza, FNP is a graduate of Southern Illinois University Edwardsville. She has a degree as a Family Nurse Practitioner and has been with the Southern Illinois Associates, LLC  since 2013.

She have her second nurse practitioner degree as a psychiatric nurse practitioner from Northern Kentucky University

Sanjay K Nigam, M.D

Dr. Sanjay Nigam, completed his medical education at Maulana Azad Medical College, New Delhi, India. After finishing his residency from Saint Louis University, St Louis  in 2002, he joined Community Counseling Center of Alton, as Psychiatric Director.


He founded Southern Illinois Associates, LLC in 2004.  He is also qualified to provides care to several local nursing homes memory care units and assisted living facilities.


He is currently the Psychiatric Director of HSHS Holy Family Hospital, Greenville, IL

Jennifer Thery PMHNP-BC

Jennifer Thery, PMHNP graduated from the University of Cincinnati

As nurse practitioner  specializes in treating bipolar disorder, depression and anxiety disorder and has a special interest in women’s psychiatric disorders

Jennifer joined Southern Illinois Associates llc as a nurse practitioner in June 2014.

Amy Lynn Hemann, MSW, LCSW

Amy Hemann, LCSW received her Masters of Social Work from Southern Illinois University in Edwardsville in 2005.

She has worked at various mental health clinics as a therapist and specializes in treating chronic depression, anxiety disorders and substance abuse disorders.

Diana Jarman, LCSW

Diana Jarman, LCSW received her Masters of Social Work from Southern Illinois University in Edwardsville in 2002

She has an   interest in working with adults with PTSD, depression, bipolar disorder and substance abuse disorder.

Your Health Starts Here

Flexible appointments.

Or call — 618-288-5019

Better Health Care is Our Mission


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16 Junction Drive West, St 2,

Glen Carbon, IL 62034

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