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Who We Treat
Meet Our Clinicians
Testimonials
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Home
Who We Treat
Meet Our Clinicians
Testimonials
Treatment Options
Contact Us
More
  • Home
  • Who We Treat
  • Meet Our Clinicians
  • Testimonials
  • Treatment Options
  • Contact Us
  • Home
  • Who We Treat
  • Meet Our Clinicians
  • Testimonials
  • Treatment Options
  • Contact Us
(301) 450-7635

Who We Treat

We offer a range of services for children, adolescents, and adults that includes treating anxiety, mood disorders, autism, addictions, and other neurodiverse clients.

Free Consultation

We believe everyone's experience deserves to be heard. In a 10-minute chat, we will listen to your story and offer a bit of direction to help you find clarity on your next steps.

Meet Our Clinicians

Dr Robert Greenstone, PsyD

Dr Greenstone brings 15+ years of clinical experience working with children, teens, and adults to address complex issues, including anxiety, depression, ADHD, Autism, addiction, and trauma. 


In addition to individual and family therapy, Dr Greenstone offers group therapies that include social skill-building for younger teens and executive functioning support for college-bound teens. 

Dr Thiala Caldas Greenstone, PsyD

Dr. Caldas is a trilingual (Portuguese, English, Spanish), neurodiversity-affirming clinical psychologist with training in pediatric psychology, pediatric neuropsychology, and psychotherapy. She has a specific interest in treating young neurodivergent children (e.g., ADHD, autism, learning differences, and certain neurological conditions like seizures. 


Dr. Caldas has received Level 1 PDA (Pathological Demand Avoidance) certification from PDA North America, and has worked with PDA families for over six years.

(301) 450-7635

Testimonials

  "We have known and worked with Dr. Greenstone for almost 6 years. Our journey with him has been life-changing, especially in managing a family with ADHD and anxiety . He creates a safe and welcoming space where we always feel understood, and his ability to use humor thoughtfully makes even the toughest conversations feel a little lighter. He finds creative and compassionate ways around tough corners. We always leave each session feeling more positive and hopeful to keep persevering. We’re incredibly grateful for his guidance and support."

-GB

"I have a long treatment history in pursuit of mental wellness. I knew something was very wrong and set out on a search for answers. That search led me to an intake evaluation with Dr. Robert Greenstone.  Thus, after a battery of testing, I was diagnosed as having ADHD and presented with other characteristics inherent to neurodiverse individuals. That's not the end of this story. Dr. Greenstone has walked a road with me that includes gender affirmation and support, healing from familial trauma, guidance and encouragement through post-concussion syndrome and making the hard call when I needed to go into substance use treatment.  He didn't just stand by me, but actively supported my family as well. To be sure, I have put in a lot of hard work. The results are evidenced in a robust life with purpose and joy. This is largely due to the tenacious support and guidance of this compassionate and gifted clinician. I could not be more grateful."

-LL 

  "Before I started working with Dr Greenstone, I didn’t fully understand how much ADHD was shaping my life—from the constant overwhelm and unfinished projects to the quiet, relentless guilt I carried every day. I thought I just needed to “try harder,” but nothing ever seemed to stick. I was exhausted from chasing routines that never lasted and feeling like I was falling short in ways I couldn’t even explain. Working with Dr Greenstone changed that. For the first time, I felt genuinely seen—not just as someone with symptoms to manage, but as a whole person with strengths, struggles, and a brain that works differently, not incorrectly. He helped me untangle years of shame and self-blame with so much patience and compassion. If you’re struggling with ADHD and wondering if things can actually get better—they can. Dr Greenstone helped me believe that, and more importantly, helped me live it."

-DK

“I had been searching the country for experts in ADHD in women and girls. When I noticed Dr. Caldas' accomplishments in the field, I knew we had to see her, even if it meant we would face a long commute. I was not disappointed; she is the best of the best. She has helped my daughter and family tremendously and I am so thankful.” 

-PD

“Dr. Greenstone has been a life saver.  Nearly 3 years ago, I found the guidance I needed to navigate my ADHD with Dr. Greenstone. After years of working with other clinicians without results, he has helped me to objectively evaluate my own behavior, to navigate situations that previous stressed my familial relationships and to make more time for my family.  My relationships and mindset are the best they’ve ever been, and for that I am eternally grateful to Dr. Greenstone. “

-MR

(301) 450-7635

Treatment Options

Individual Therapy

Individual Therapy

Individual Therapy

Our individual therapy sessions are designed to help clients navigate a wide range of mental health challenges, from anxiety and depression to trauma and relationship issues. We utilize evidence-based treatments to help clients build resiliency, develop healthy coping skills, and achieve their goals.

Couples Therapy

Individual Therapy

Individual Therapy

Our couples therapy sessions help partners deepen their connection, improve communication, and resolve conflicts. We work with couples to identify patterns of behavior that may be causing distress and provide tools to help them build a stronger, healthier relationship.

Family Therapy

Individual Therapy

Family Therapy

Our family therapy sessions are designed to help families identify patterns, differences, and needs to build stronger relationships. We believe that every family has unique strengths, and we work with families to identify those strengths and build on them to create a more positive and supportive family environment.

Teletherapy

Group Therapy

Family Therapy

Our teletherapy sessions allow clients to receive quality mental health care from the comfort and convenience of their own home. We utilize a secure and easy-to-use platform to provide clients with a safe and confidential space to discuss their concerns and work towards their goals.

Group Therapy

Group Therapy

Group Therapy

Our PEERS-based Social Skills program includes ways that middle and high schoolers can improve their interpersonal skills. It has been adapted to include experiences that many neurodiverse children face (e.g. impulsivity, poor boundaries of personal space, distractedness and not listening, disorganization, sitting quietly, and interrupting others) by increasing their immediate social awareness and helping them practice new skills with roleplay exercises.


Our ADHD College Preparation  group helps older teens make a successful transition and stay on track to meet goals. We will focus on getting adequate sleep, healthy daily habits, life management skills, time management in the less-structured college environment, keeping up with class assignments, avoiding distractions and navigating the new social world.


Our Organized, Thriving, and Awesome for Girls with ADHD group addresses several ADHD topics including cognitive, emotional, social, and behavioral functioning while also promoting self-confidence and awareness. The girls will learn effective, easy-to-use skills to manage their challenges and invest in their strengths in all settings of their lives. 

Contact Us

Address: 9841 Washingtonian Blvd, Suite 200 Gaithersburg, MD 20878 Phone: (301) 450-7635 Email: Robert@Greenstone-Psychology.com Hours: 9:00am-7:00pm, Monday-Friday

Copyright © 2025 Greenstone Psychology - All Rights Reserved.


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