Provider Directory

Kiley Callahan

Psychologist, PhD

I’m New York-based psychologist and Assistant Professor of Psychiatry at the Ichan School of Medicine at Mount Sinai.

I work individually with adults and adolescents (ages 16 and up) experiencing anxiety, obsessive-compulsive disorder, depression, insomnia, relationship challenges, life transitions, and academic or work stressors. I have formal training in research-based treatments, including cognitive behavioral therapy (CBT), acceptance and commitment therapy (ACT), and dialectical behavior therapy (DBT). In addition to private practice, I currently serve as a psychologist for the Center for Stress, Resilience, and Personal Growth at Mount Sinai where I provide mental health services to healthcare workers and their families.

I earned my bachelor’s degree at Boston College and went on to complete my doctoral training at Loyola University Chicago. After completing my APA-accredited internship at a therapeutic day school, I went on to do my post-doctoral fellowship at MindWell NYC, a private practice in New York, NY specializing in dialectical behavior therapy (DBT) and cognitive behavioral therapy (CBT).

Robin Rosenberg

Psychologist, Ph.D., ABPP

Robin S. Rosenberg is a clinical psychologist with psychotherapy and executive coaching practices. She is board certified in clinical psychology by the American Board of Professional Psychology. In her psychotherapy practice, Dr. Rosenberg specializes in treating people with anxiety disorders, eating disorders, depression, and work-related issues, and in treating couples. She helps people develop new tools, skills, and awareness and to capitalize on people’s strengths and resources in order to reduce their distress or suffering, and to increase the quality of their daily lives and their connections with others. She was also founder and CEO of Live in Their World, a company that uses virtual reality to address issues of bias and incivility in the workplace.

Rebecca Harmon

Psychologist, Psy.D.

I am a New York State licensed clinical psychologist who offers individual psychotherapy to adults, ages 18 years and older. I work with people who are experiencing issues of adjustment, anxiety, and/or depression, particularly due to stressful life circumstances and transitions, or challenging relationships.

Andrew J. Gerber

Psychiatrist, MD, PhD

Dr. Gerber is a child and adolescent psychiatrist whose career combines his work as a clinician, scholar, research scientist and executive. He completed his medical and psychiatric training at Harvard Medical School, Cambridge Hospital and Weill Cornell and Columbia medical schools; he completed his PhD in psychology at University College London and the Anna Freud Centre.

Prior to joining Silver Hill, Dr. Gerber was Director of the Magnetic Resonance Imaging (MRI) Program at the New York State Psychiatric Institute, Columbia Medical Center and Medical Director and CEO of the Austen Riggs Center in Stockbridge, Massachusetts. Among his many affiliations, he serves as associate clinical professor in the Division of Child and Adolescent Psychiatry at Columbia University Medical Center and as associate clinical professor at the Child Study Center, Yale University.

Melissa Guttman

Licensed Creative Arts Therapist

I help highly sensitive clinicians connect with their authentic voice and intuition. I offer consultation on integrating IFS into narcissistic abuse treatment, facilitate support groups for therapists, and provide therapeutic vocal coaching for singers rediscovering their voices after trauma.

Basha Silver

Psychologist, Psy.D.

Dr. Basha Silver is a New York State licensed clinical psychologist. Dr. Silver earned a Psy.D. in Clinical Psychology from Ferkauf Graduate School of Psychology-Yeshiva University and a B.A. from Colgate University in Sociology & Anthropology. She specializes in the treatment of anxiety (e.g. social anxiety, OCD, panic, generalized anxiety). She has particular interest in reproductive mental health, including infertility, third party reproduction, postpartum mood and anxiety disorders, and the adjustment to parenthood. She also enjoys addressing issues related to young adulthood, including peer and relationship stressors, challenging family dynamics, and the adjustment to college and post-college life.

Anitta George

Psychologist, Ph.D.

Hi there! Do your emotions feel like a tangled knot inside you? Anytime our feelings or behaviors interfere with living our best life, therapy can help. I am passionate about working with adults, children and couples dealing with emotional struggles.

Henri-Lee Stalk

Psychologist, J.D., Ph.D.

Henri-Lee Stalk is a licensed clinical psychologist (NY and NJ) and attorney (NY). She holds a PhD in Child Psychology and a JD from the University of Hawaiʻi at Mānoa.

She completed her undergraduate studies at the University of Edinburgh, a post-baccalaureate degree in Psychology at Columbia University, and an APA-accredited internship with the Hawaiʻi Psychology Internship Consortium.

She currently serves as an advisor to global business-owning families and ultra-high-net-worth families on intergenerational communication, development, and legacy planning.

Constance Mennella

Psychiatrist, DO

I am a board certified adult and child psychiatrist specializing in the treatment of anxiety, mood, attentional and behavioral disorders. I provide initial diagnostic psychiatric evaluation and medication management when indicated.

I take a family-based integrated care approach, working collaboratively with families to identify the individual’s strengths. Additionally, I have clinical and research expertise in anxiety disorders. I have published in the the Journal of American Academy of Dermatology and the Journal of Child and Adolescent Psychopharmacology. I served as Chief Resident at the Brown University Child and Adolescent Psychiatry Fellowship Program.

Sandra L. Green

Clinical Social Work/Therapist, LCSW, SEP

I am a NYS Licensed Psychotherapist in practice on NYC’s Upper Westside for 30 years. I treat adults with a full range of problems in living and have advanced specializations in psychoanalysis and trauma resolution methods. I particularly appreciate working with individuals who are committed to creating meaningful lives, and firmly believe that psychotherapy can be an effective component of this process .

Brittany Beispel

Clinical Social Work/Therapist

I'm a psychotherapist working with adolescents and adults. My goal is to create a warm and supportive environment where you can feel comfortable to express yourself and make changes in your life.

Rebecca Halperin

Clinical Social Work/Therapist, LCSW

Rebecca Halperin, LCSW, is an experienced psychotherapist specialized in integrating psychodynamic psychotherapy with Somatic Experiencing and other body based approaches to treatment. Rebecca works primarily with individuals who have experienced trauma - historically/developmentally or recently - as well as individuals facing other stressors and symptoms. Rebecca has fifteen years in the mental health field working with all ages from preschool to geriatric; currently she primarily treats adolescents and adults.

Johanna Wekar

Clinical Social Work/Therapist, LCSW

I am a Licensed Clinical Social Worker and have been in practice for over 20 years. I am intensively trained in Dialectical Behavior Therapy (DBT). I also specialize in ACT, DBT-PE and CBT. I enjoy working with older adolescents, adults and seniors. I work with a variety of presenting problems including depression, anxiety, PTSD, maladaptive behaviors and dysregulated emotions.
I have supervised and trained other clinicians utilizing DBT.
I am only providing Teletherapy.

Christine Zaychik

Mental Health Counselor, LMHC

I am a therapist providing holistic and compassionate care for individuals struggling with anxiety, experiences of trauma, phobias, trichotillomania, relationship difficulties, and family distress. I practice somatically using tools such as EMDR, Accelerated Resolution Therapy (ART), and Trauma Releasing Exercises (TRE).