Specializing as an ADHD Psychologist in Philadelphia

Marcy M. Caldwell, Psy.D. is a licensed clinical psychologist who specializes in the treatment and assessment of adult ADHD.

Dr Marcy Caldwell

Licensed Psychologist. Specialist in evaluation and treatment of adult ADHD. Practicing for over 15 years.


In addition to her private therapy practice, Dr. Caldwell is the director and chief psychologist at Rittenhouse Psychological Assessments, LLC as well as the senior assessment supervisor at Tuttleman Counseling Services at Temple University and Lecturing Professor at the University of Pennsylvania. She has also worked at Seabrook House, The JJ Peters Institute and Villanova University, focusing on therapy and assessment with late adolescents and adults related to topics of ADHD, learning disabilities, addiction, eating disorders and student success.

My style is warm, collaborative and strengths focused. I use practical CBT techniques and strategies to target specific areas of concern while being sure to also respectfully and compassionately address the emotional and psychological aspects that may be making success harder to grasp. Using a highly individualized, clinically rich and comprehensive evaluation I map your cognitive and emotional strengths and weaknesses and then guide you in a process that utilizes those areas of strength to help overcome the hurdles in your way. My goal is for my client’s to fully realize their potential while also finding peace and a sense of wellbeing. To read more on my process, please also visit Rittenhouse Psychological services.

People with ADHD often know what to do, but have a hard time doing it. Medication can help with sustaining attention and energy. However, most adults with ADHD still struggle to meet their goals because they have difficulty getting started, organizing, prioritizing and staying on task. This is where I can help. I can pinpoint exactly what it is that gets in your way, strategize ways around those hurdles and then provide the accountability needed to keep you on task.

ADHD is a performance issue and therefore concrete, performance-based solutions are necessary. However, these performance issues also have long-standing emotional ramifications including sadness, frustration, anger and low self-esteem. These emotional aspects of ADHD need to be addressed with warmth and compassion in order to assure that they don’t further impede progress.

Many therapists work only with one aspect of ADHD treatment- either they focus on solutions or they deal with the emotional ramifications of the disorder. I have both the ability and the experience to effectively deal with both in a way that respects their impact and importance. I concentrate on hands-on techniques to help you find strategies to help your symptoms but I also discuss, process and address the emotions that come along with them. By working on both of these aspects of the ADHD picture you can find greater peace and success more quickly and reliably.

Please click here to read more about ADHD Therapy.

Contact me to schedule a free 20 minute consultation to see if therapy could be just what you need to help you manage your symptoms today.

While I am no longer accepting new clients I have personally trained and supervise each member of our team and I'm happy to help you find the one that may be the best fit for you.

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With everything going on in your world, ADHD may feel like the last thing you want to be dealing with right now.


Diane Miller, MA

You may have a job, a family, and you just want to complete the goals you set for yourself, but things aren't working the way you want them to. Maybe you’ve tried treatment in the past and it didn’t work out or maybe this is the first time you’re considering it. However you got here, I’m glad you made it.

It takes courage to recognize that you could use support getting to a place where you feel more balanced in your life-- like you can finally act on your intentions. And I’d be honored to lend you a hand and take this journey with you. I believe in creating a therapy space of trust, equity, and support to collaboratively work towards clients’ specific needs. My work focuses on exploring how your experiences with ADHD and interactions with your environment have impacted how you presently see yourself, to grow to a place of acceptance of your beautiful uniqueness.

While earning a doctorate in Clinical Psychology and a master’s in Human Sexuality, I’ve gained knowledge in working with diverse populations including refugees and LGBTQIA+, in an array of clinical settings including community mental health, college counseling, substance use treatment, and psychiatric hospitals. I practice from a space of cultural humility and competence, whereby I acknowledge each client’s culturally dynamic experiences and the ways they may impact their daily lives. I can't wait to welcome you and get started on building that life you've been dreaming of.

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It is my honor to collaborate with clients as they access their strength and resilience to make and maintain meaningful change.

Aviva Rosenberg, LCSW 2

Aviva Rosenberg, LCSW

I work to create a warm, non-judgement and trauma-informed therapy space, so we can develop an individualized treatment plan tailored to your personal values and needs. We then partner together as we explore the many facets and layers of you, your family and your environment in order to help you learn more about yourself, understand your struggles and make concrete changes in your life. I believe in a person’s ongoing ability to grow and change and it is my pleasure to partner with you on that journey.
I am a licensed clinical social worker, with a master’s in social work from the University of Chicago. I am also trained in EMDR therapy and EFT couple’s therapy and have experience supporting couples and families with familial trauma, relationship issues, and life transitions. My therapeutic foundation is in relational work. This means prioritizing the therapeutic relationship and the dynamics in the therapy room as a model to support to create meaningful relationships and connections throughout your life.

I look forward to meeting and working with you.

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My passion as a therapist is to work as a team with my clients to help them live a life they love.


Mattea LeWitt, LCSW

I'm dedicated to helping people come up with concrete and practical day-to-day strategies that actually work for the lives and the brains of my clients. Additionally, I believe the stories we tell ourselves matter, so I balance that practical work with exploring the emotional and historical aspects of my clients' struggles.

I'm a licensed clinical social worker with a master's degree in social work from the University of Pennsylvania. While my focus and specialty is working with adults with ADHD, I also have expertise in stress, trauma, relationship challenges, life transitions/changes, parenting, and emotion management. My clinical background involves work in the community, home, and schools, and I'm passionate about helping underserved groups, including LGBTQ+ individuals, neurodiverse people, multi-cultural populations, and veterans.

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My passion is working with individuals, families, and groups with Adult ADHD, helping people understand their everyday struggles and make meaningful change in their lives.



By creating a warm and safe environment in which to explore and be curious, I team up with you to help you develop greater insight into your current difficulties and find strategies to address them. My main role as your therapist will be to help you identify patterns of behavior that no longer work for you while also assisting you with addressing the emotional concerns and psychological blindspots that may make you feel stuck and unable to change. In order to do this, I work to build a strong and trusting relationship with my clients so that your therapy can meet your individual needs and goals. Together we work towards helping you achieve a greater sense of purpose and fulfillment in your life.

I earned my doctorate in clinical psychology from George Washington University. I have worked in a variety of settings, including outpatient clinics and university counseling centers, most recently completing a post-doctoral fellowship at Temple University’s Tuttleman Counseling Center. At Temple, I served a diverse population of college students. I specialize in working with young adults with ADHD and learning disabilities, mood disorders, substance use concerns, and LGBTQ+ populations. I use a client-centered and multiculturally-informed approach to my work with individuals and groups and I am always striving to balance the emotional and practical aspects of ADHD treatment. I also provide comprehensive diagnostic and psychological evaluations for ADHD and learning disabilities as well as work with local adoption agencies to evaluate prospective parents.

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I believe that therapy should be a partnership and strive to create a warm environment where trust can grow, and people can thrive.


Mary Salotto, Psy.D.

I hope to help each of my clients identify what makes them their best selves and learn how to leverage those strengths. By finding ways to work with your brain instead of against it, we can create individualized strategies that are both practical and effective for you. As a person with ADHD myself, I also know that its effects often reach outside of productivity and organization into psychological and emotional wellbeing. I treat every client as a being in their entirety and aim to address all aspects of their lives that they feel have been impacted. No two people are just alike; we will find things that work for you and your unique brain, your busy life, and your personal goals.

Prior to joining Rittenhouse Psychological Services, I earned my Doctorate in Clinical Psychology from Widener University. I have a range of experiences in clinical settings ranging from schools to substance use treatment and evaluation of severe mental illness. My significant experience with psychoeducational assessment has helped to shape my therapeutic style. I combine problem-solving and logical approaches with compassion and empathy in order to help each person construct an inner and outer life they love.

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It is both my passion and my privilege to work with clients as a team to help them find strategies that work for their lives and create lasting change.


Karishma Lalchandani, Psy.D

I work to create a comfortable environment of respect and equality in which to address not only the practical challenges of ADHD but also the emotional ones. Our work may contain practicing strategies to make your daily life easier, discussing how ADHD and other aspects of your life have affected your current mindset and relationships, coaching you through your overwhelming list of tasks, or (most likely) a mix of all of it. Each individual is different and what they bring to therapy will be unique. I work with you to create goals that are specific to your life, your brain and your dreams.

I have clinical experience in an array of settings including schools, psychiatric hospitals, substance abuse centers, and college counseling. Throughout my experience, I have always focused on tailoring therapy to the specific needs and goals of my clients while creating a space where effective therapy can take place. I look forward to welcoming you into that space and teaming up with you to help you meet your goals.

I am not longer accepting new clients, but I invite you to connect with one of the other great clinicians at RPS and find a great fit.