Linden Oaks Hospital

Kelli M. Keller, MD, a psychiatrist at Endeavor Health, has been providing comprehensive psychiatric care since 2003. She brings experience in both psychopharmacology and psychotherapy, with a focus on treating individuals with depression and bipolar illness. Dr. Keller completed psychiatric training at Lutheran General Hospital in Illinois and at Albert Einstein College of Medicine and Montefiore Medical Center in New York, combining clinical insight with evidence-based treatment to support long-term mental wellbeing.

Amber N. Asbach, ANP-CNP, an advanced practice clinician specializing in psychiatry at Endeavor Health, provides care for individuals across the lifespan with a focus on co-occurring psychiatric and substance use disorders. She earned her Bachelor of Science in Nursing from Elmhurst University and her Doctor of Nursing Practice from Rush University. Before becoming a nurse practitioner, Amber gained experience as a registered nurse in community health, substance use treatment and inpatient psychiatry.

Jennie R. Hackman, APN-CNP, an advanced practice clinician specializing in psychiatry at Endeavor Health, provides care for individuals experiencing mood disorders, anxiety and eating disorders. She earned her advanced practice nursing degree from the University of St. Francis and supports patients across a range of behavioral health conditions. Jennie collaborates with care teams to deliver evidence-based treatment in both outpatient and inpatient settings.

Ghassan Aldurra, MD, a psychiatrist at Endeavor Health and chair of the psychiatry department at Elmhurst Hospital, has served the community for over 20 years. He combines clinical expertise with deep compassion to treat each patient as an individual-not just a diagnosis. Dr. Aldurra works with a multidisciplinary team to provide care in a safe, respectful and collaborative environment where patients feel supported and understood.

Bradley R. Cutler, MD, a psychiatrist at Endeavor Health, provides diagnostic assessment and treatment for a range of mental health conditions. He works with patients to develop individualized care plans that may include psychotherapy, medication or a combination of both. Dr. Cutler supports patients in achieving greater emotional wellbeing and stability.

Anu Mathur, MD, a psychiatrist at Endeavor Health, provides care for adults with anxiety and mood disorders. She has a clinical interest in integrative medicine and takes a collaborative approach to support both mental and physical wellbeing. Dr. Mathur draws on her background in psychology and psychiatry to offer thoughtful, patient-centered treatment grounded in evidence-based care.