Addiction therapists & psychiatrists in Gaithersburg, MD

Hey, I'm Antoinette — a psychiatric nurse practitioner who believes that healing isn't just about what's happening in your head, but what's happening in your whole body. I specialize in eating disorders, mood disorders, depression, and anxiety, and I bring over seven years of experience in some of the most specialized treatment settings in the country to every session.

Dr. Troy A. Waller, a Licensed Professional Counselor with more than two decades of experience, provides services across Washington, D.C., Maryland, and Virginia. He focuses on trauma recovery and offers consultation to government agencies and hospital regarding stress, anxiety, and mental health concerns.

Hello, and welcome. My name is Darius Brittingham, and I am a mental health and substance abuse therapist with a Master’s degree in Rehabilitation Counseling. I am passionate about helping individuals navigate life’s challenges while building the skills needed to create meaningful and lasting change. My professional background includes working with individuals experiencing mental health concerns, substance use challenges, stress, anxiety, and life transitions. I strive to create a supportive, respectful, and non-judgmental environment where clients feel comfortable exploring their thoughts, emotions, and goals.

I have been a practicing therapist for a decade and I have special interests and certifications in addiction and perinatal mental health. I received my masters degree from the George Washington University and have a perinatal specialist certification from Postpartum Support International.

Dr. Opelt earned his Ph.D. in Counseling Psychology at New Mexico State University after completing his Master’s of Science in Educational Psychology: Community Counseling from the University of Wisconsin - Milwaukee. During his graduate training, he earned certifications in Trauma Counseling and Multicultural Knowledge Basis in Mental Health Practices, and a graduate minor in Integrated Behavioral Health. Dr. Opelt has completed postdoctoral fellowships in research in Rehabilitation Psychology, with an emphasis on Multiple Sclerosis, at Johns Hopkins School of Medicine, and in clinical Rehabilitation and Pain Psychology at MedStar Health National Rehabilitation Hospital. He has focused his clinical work on adults who have concerns about insomnia, cognitive impairment, addiction, LGBT+ concerns, caregiver support, transplants, burn survivors, cancer, musculoskeletal diseases like MS and Parkinson’s disease, and those who have amputations. He is a licensed psychologist in Maryland and Illinois.

With 14 years as a psychiatric registered nurse before becoming a practitioner, I bring both clinical expertise and heartfelt understanding to every patient interaction. I strive to create a safe, judgment-free space where you can feel understood and supported. Together, we’ll explore your unique experiences, identify what’s holding you back, and develop strategies to help you move forward with confidence and hope.

Malcolm is a Psychiatric Nurse Practitioner with dual board certification in Family Practice. I am a native New Yorker with over 20 years of healthcare experience. Growing up in New York City, I’m comfortable working with diverse populations. I’ve served clients from various religious, socioeconomic, cultural and sexual orientation backgrounds.

I provide structured, evidence-based psychiatric care for adolescents and adults with anxiety, mood disorders, ADHD, and complex mental health conditions. I specialize in treating individuals who have had limited response to prior treatment and require a more personalized, clinically guided approach. I also have extensive experience supporting individuals with autism spectrum disorder (ASD) and intellectual and developmental disabilities (IDD) in both community and residential settings.