Linden Oaks Hospital

Ceres Kangou, APN-CNP, an advanced practice clinician specializing in psychiatry at Endeavor Health, provides evaluation and treatment for a range of mental health conditions. She cares for patients experiencing depression, anxiety, mood disorders and trauma-related concerns. Ceres works with patients to develop personalized care plans that promote emotional wellbeing and long-term mental health.

Kelsey C. O'Connor, APN-CNP, a nurse practitioner specializing in psychiatry at Endeavor Health, provides care for adolescents and adults with mood disorders, addictions and other behavioral health conditions. Kelsey brings experience from a range of inpatient and outpatient mental health settings and she collaborates with individuals to create treatment plans that support emotional wellbeing and long-term recovery.

Nicholas Midlash, PA-C, a certified physician assistant specializing in psychiatry at Endeavor Health, provides care for adolescents through adults experiencing a wide range of mental health conditions. He earned his Master of Medical Science in Physician Assistant Studies from Midwestern University in Downers Grove. Nicholas treats all psychiatric conditions, with particular interest in mood disorders, anxiety and phobias. He also incorporates a holistic approach to support overall health and wellbeing in his practice.

Faizal Malkana, PA, a psychiatric physician assistant at Endeavor Health, provides care across all levels of mental health, from office visits to hospital-based treatment. He brings a multifaceted approach informed by medical ethics, cultural values and a deep respect for each person’s autonomy. He helps patients navigate complex conditions with empathy, listening and shared decision-making. Faizal also supports treatment-resistant conditions with emerging therapies like TMS and ketamine-assisted care.

Ryan T. Gallagher, APN-CNP, an advanced practice clinician specializing in psychology at Endeavor Health, provides care for individuals across a broad range of mental health needs. He earned his Bachelor of Science in nursing from Chamberlain University and his Master of Science in Nursing from Lewis University. Before becoming a nurse practitioner, Ryan worked as a registered nurse in the Chicago area, including Good Samaritan Hospital and MacNeal Hospital, for eight years. His clinical interests include mood disorders, anxiety and phobias, PTSD, stress management and older adult mental health.

Thomas Patrick Cothran, PhD, a psychologist at Endeavor Health, provides therapy and psychological evaluation for individuals seeking support for mental health concerns. He works with patients to explore challenges, develop coping strategies and improve emotional resilience. Dr. Cothran tailors treatment to meet each person’s unique needs and goals.

Kevin Masterson, MD, a psychiatrist at Endeavor Health, specializes in general and addiction psychiatry. He focuses on improving patients’ quality of life through personalized treatment plans that address both mental and physical health. Dr. Masterson incorporates lifestyle psychiatry and evidence-based care to help individuals feel more in control, reduce discomfort and foster joy in their lives.