Steve  Marshall

Steve Marshall


Psychologist, PhD Practice: Cambridge Psychology Group Specialties Insurance & Fees Locations
Massachusetts Accepting Online
Arlington Accepting In-person
Updated April 20, 2023

Specialties & Expertise

  • Obsessive compulsive disorder (OCD)
  • Anxiety
  • Depression
  • Mood disorders
  • ADHD
  • Perfectionism

Professional statement

Dr. Marshall is the director and founder of Cambridge Psychology Group and Lecturer in Psychology at Harvard Medical School. At CPG, he manages many aspects, including program development, training, and supervision, but Dr. Marshall also enjoys keeping an active practice as a clinical psychologist. He treats adults and youth with anxiety, OCD, depression, adjustment difficulties, ADHD, and substance use problems, among other conditions. His approach is grounded in evidence-based practice, which means that he integrates your values and preferences, current scientific evidence, and years of clinical experience. Throughout his practice, Dr. Marshall strives to be a friendly, thoughtful, and collaborative clinician.

His work is grounded in Cognitive Behavioral Therapy, Exposure Therapy, and Acceptance and Commitment Therapy. In addition to individual work, Dr. Marshall is passionate about leading therapy groups. He currently leads an ACT for Anxiety and Depression Group and an OCD Support Group.

Dr. Marshall received his PhD in clinical psychology from Ohio University, and he completed his predoctoral internship and postdoctoral fellowships at Harvard Medical School and McLean Hospital. While at McLean, he worked in the Behavioral Health Partial Program providing Cognitive Behavioral Therapy to individuals with a range of mental health conditions. He also worked at the College Mental Health Program, and he trained at the OCD Institute at McLean, which is one of the leading residential centers in the world for the treatment of OCD. He currently serves as a consultant at The Pavilion, which is a center for expert diagnostic assessment and treatment of complex psychiatric conditions at McLean, and he continues to supervise trainees at the hospital.

Message to clients

If you are interested in working with me or other CPG providers, please reach out. We are happy to set up an initial phone conversation, which is a great way to determine if one of our therapists may be a good match for your needs. In this conversation, we'll also provide further details about Cambridge Psychology Group, current availability, fees, and other information to get started.

We know reaching out can be difficult. It can be hard to feel confident that the providers you contact are going to be kind, understanding, well-trained, and specialized in your unique concerns. We created Cambridge Psychology Group as a place that you can trust you'll receive the best care possible from a group of incredibly warm and dedicated therapists. Whatever the reason you're seeking therapy, we believe the CPG can be the ideal place for you.


Obsessive compulsive disorder (OCD) - Reducing unwanted intrusive thoughts and rituals by gradually building comfort and confidence facing difficult fears, thoughts, and emotions

Anxiety - Coping with excessive worry, nervousness, or stress; intense discomfort in social settings (social anxiety); sudden and intense feelings of panic (panic disorder)

Depression - Providing support and promoting healing of hopelessness, low motivation and energy, sadness, irritability, sleep disturbance, and loss of interest and pleasure in life

Mood disorders - Clinical depression, persistent depression, bipolar disorder, and other mood disorders that cause disturbances in the client's mood, causing mood swings, restless sleep, and/or elevated mood

ADHD - Skill-building and support around organizational challenges, distracted attention, procrastination; building and maintaining healthy routines and structure

Perfectionism - Coping with feelings of anxiety, stress, self-criticism, and procrastination; addressing unrealistic expectations of one’s self and negatively comparing self to others


  • Adults (24+)
  • Teenagers (13-18)
  • Young adults (18-24)


Steve Marshall is not in-network with any insurances.

Read about the benefits of seeing an out-of-network provider here.

Out-of-pocket fees

  • Individual sessions: $350 (50min)

Additional session information

Out-of-network billing options

This provider can support you in getting reimbursement from your insurance company if you are seeking out-of-network reimbursement. Here are the out-of-network billing options they provide:

  • Super billing
Payment options
  • Cash
  • Credit Card
  • Debit Card
Session frequency

Frequency of sessions this provider offers to see clients once you are an established client.

  • Weekly
  • Every other week
  • Multiple times a week
  • As needed


Online Sessions (Massachusetts)
Accepting new clients online
Currently Available Times
  • Morning (Before 10am)
  • Daytime (10am - 1pm)
  • Afternoon (1pm - 5pm)
  • Evening (After 5pm)
  • Weekends
Regular Hours
  • Mon 8:00am - 8:00pm
  • Tue 8:00am - 8:00pm
  • Wed 8:00am - 8:00pm
  • Thu 8:00am - 8:00pm
  • Fri 8:00am - 8:00pm
  • Sat 8:00am - 5:00pm
  • Sun 8:00am - 5:00pm

Arlington practice
226 Massachusetts Ave, ST 2A, Suite #2A, Arlington, Massachusetts 02474
Accepting new clients in-person
Currently Available Times
  • Morning (Before 10am)
  • Daytime (10am - 1pm)
  • Afternoon (1pm - 5pm)
  • Evening (After 5pm)
  • Weekends
Regular Hours
  • Mon Please inquire about hours
  • Tue Please inquire about hours
  • Wed Please inquire about hours
  • Thu Please inquire about hours
  • Fri Please inquire about hours
  • Sat Please inquire about hours
  • Sun Please inquire about hours

Work and Education

Years of Experience: 9 years

McLean Hospital/Harvard Medical School, Staff Therapist, The Pavilion, 2016 - Present
Cambridge Psychology Group, Licensed Clinical Psychologist & Founder, 2020 - Present
McLean Hospital/Harvard Medical School, Staff Therapist, College Mental Health Program, 2017 - 2019
McLean Hospital/Harvard Medical School, Clinical Fellow, Behavioral Health Partial Program, 2016 - 2017

Ohio University, Ph.D., Clinical Psychology, 2018
McLean Hospital/Harvard Medical School, Predoctoral Internship, 2016
Davidson College, B.A., Sociology, 2000


Massachusetts: 11006