Mary Cahill, PMHNP

At the practice of Mary Cahill, PMHNP, in Brooklyn, New York, care is led by Mary Cahill, a dual board-certified psychiatric mental health nurse practitioner, who provides thoughtful, patient-centered psychiatric care for adults. Mary brings decades of experience as both a registered nurse and nurse practitioner across hospital, outpatient, and community health settings, allowing her to approach mental health with a broad clinical perspective and a deep understanding of whole-person health. 

Mary completed her psychiatric mental health nurse practitioner post-master’s certificate at NYU Rory Meyers College of Nursing, where she also completed a fellowship at Bellevue Hospital focused on psychiatric care. She earned her Master of Science in Nursing as an Adult and Geriatric Nurse Practitioner from Columbia University, and her Bachelor of Science in Nursing from the University of San Francisco, graduating summa cum laude. Her advanced education and extensive clinical training allow her to provide thorough psychiatric evaluations, accurate diagnoses, and evidence-based medication management. 

Mary has worked in inpatient psychiatry treating conditions such as schizophrenia spectrum disorders and bipolar disorder, and has extensive experience managing complex cases, conducting psychiatric evaluations, and providing ongoing medication management. She is known for her strong clinical judgment, expertise in psychopharmacology, and commitment to patient education, ensuring patients fully understand their diagnosis and treatment options. 

The practice focuses on comprehensive psychiatric evaluations, medication management, consultations and second opinions for adults, with a collaborative and personalized approach to care.

Conditions treated include Depressive Disorders, Anxiety Disorders, Bipolar Disorders, Psychotic Disorders and Schizophrenia, Post-Traumatic Stress Disorder (PTSD), and Obsessive-Compulsive Disorder (OCD).

Mary works closely with each patient to monitor progress, adjust treatment when needed, and ensure care remains effective over time.

Every patient should feel heard, respected, and supported. If you’re ready to take the next step toward better mental health, schedule a psychiatric evaluation with Mary Cahill, PMHNP, by calling the office or booking an appointment online.