57 Bedford St., Lexington, MA 02420

Group Leaders

Meet the Group Leaders for group therapy sessions.

Jason Krompinger, PhD

Jason Krompinger is a clinical psychologist who specializes in treating obsessive-compulsive disorder and related disorders. He works as an Assistant Psychologist and Senior Research Associate at the MGH/McLean OCD Institute in Belmont, MA, where he also maintains a small private practice. He also holds a faculty appointment at Harvard Medical School and is deeply involved in the clinical training of interns, post-doctoral fellows, and early-career psychologists. As part of Dr. Crowley's practice, he runs treatment groups that are geared towards undermining emotional avoidance, worry, rumination, and perfectionism.

Link  |  Email

Julie McCarthy, Ph.D.

Julie McCarthy is a clinical research fellow at McLean Hospital/Harvard Medical School. She recently completed her Ph. D. in clinical psychology, and she specializes in the study and treatment of social, motivation, and emotion regulation difficulties of older adolescents and adults with schizophrenia and related disorders, including depression and bipolar disorder. She has experience conducting individual and group psychotherapy across a variety of outpatient, partial hospitalization, and inpatient settings. Dr. McCarthy approaches treatment from a Cognitive Behavioral Therapy (CBT) framework that incorporates skills and principles from Acceptance and Commitment Therapy (ACT), Dialectical Behavior Therapy (DBT), and Motivational Interviewing to provide individualized and recovery-oriented services. Dr. McCarthy has a small private practice, and she runs treatment groups targeting the development of DBT skills, ACT skills, and motivational enhancement for Dr. Crowley’s practice.

Link  |  Email

Steve Marshall, MS

Steve Marshall, M.S. recently completed his pre-doctoral internship at Harvard Medical School/McLean Hospital. He is now a post-doctoral fellow at McLean’s Behavioral Health Partial Program (BHP), where he conducts group and individual therapy, as well as trains doctoral students. At the BHP, he treats clients with a wide range of mental health problems using a combination of Cognitive Behavioral Therapy, Acceptance and Commitment Therapy, and Dialectical Behavior Therapy. Steve believes strongly in the ability of group therapy to reduce suffering and inspire people to make lasting change. In addition to the BHP, he leads groups for the Pavilion Program at McLean Hospital and for Dr. Crowley’s practice.  Steve received his B. A. from Davidson College and will receive his Ph. D. this year from Ohio University, where he completed his doctoral training in clinical psychology.

Link  |  Email

Stéphanie Boyer, PhD

Dr. Stéphanie Boyer is a Clinical Fellow in Psychiatry at Harvard Medical School and an Assistant in Psychology at McLean Hospital. She received her Ph.D. in Clinical Psychology from Queen’s University (Kingston, Ontario, Canada), and then completed a one-year Postdoctoral Fellowship at the Klarman Eating Disorders Center at McLean Hospital, where she continues to provide individual and group therapy services. Dr. Boyer is experienced in providing psychological services to adolescents and adults in residential, partial hospital and outpatient settings. She has particular research and clinical expertise in the assessment and treatment of women’s health concerns, including eating disorders.  Dr. Boyer's practice is grounded within the biopsychosocial model, and primarily uses Cognitive Behavioral Therapy (CBT), Acceptance and Commitment Therapy (ACT), and Dialectical Behavior Therapy (DBT). Dr. Boyer provides individual and group therapy services within Dr. Crowley’s practice.

Link  |  Email


Dr. Crowley has been a life changing resource for me. I am diagnosed with OCD and am recovering from an eating disorder as well. When I am meeting w ... - Anon, Boston MA


Articles of Interest

Crowley, M. J. & Olivardia, R.  (2002).  What coaches should know about the treatment of eating disorders in female athletes.  N ...

Q & A

What kinds of insurance do you accept?

Although we are not currently on any insurance panels for either individual or group psychotherap ...



Mary Ellen Crowley, Ph.D.
Assistant Psychologist
McLean Hospital

Instructor of Psychology
Department of Psychiatry
Harvard Medical School




Privacy Policy
Terms of Use

Mary Ellen Crowley, Ph.D.

Design/Programming Copyright:

Mike Crane Photography
Karen J. Rogers Photography

Site Navigation

Home Page
Admin Log-in

Office Location:

57 Bedford Street, Suite 230
Lexington, MA 02420