Dr. Mark Hessenthaler, MD

Dr. Mark Hessenthaler, MD, is a seasoned adult psychiatrist known for blending cutting-edge treatments with a personalized, collaborative approach to mental health care. With a medical degree from the American University of the Caribbean School of Medicine, Dr. Hessenthaler offers a unique skill set that combines psychopharmacology, Mindfulness-Based Therapy, and Cognitive Behavioral Therapy (CBT) for insomnia and trauma-related sleep disturbances. His goal is to work side-by-side with each patient to uncover the most effective, holistic pathway to recovery—helping adults not only manage their symptoms but reclaim lasting emotional and physical wellness.

What sets Dr. Hessenthaler apart is his advanced expertise in neuromodulation therapies, including Transcranial Magnetic Stimulation (TMS) and esketamine nasal spray for treatment-resistant depression. His initial work with TMS began while treating Active Duty Service Members with Major Depression for the Department of Defense, where …he witnessed firsthand the remarkable impact of this non-invasive therapy. He remains deeply engaged in exploring the expanding role of TMS for conditions such as PTSD, Obsessive-Compulsive Disorder (OCD), and even Neuropathic Pain—offering patients alternatives when conventional treatments fall short.

Dr. Hessenthaler treats adults 18 and older, and his practice is rooted in the belief that mental health recovery is never one-size-fits-all. Whether someone is facing chronic depression, anxiety, trauma, or sleep challenges, his multifaceted approach draws from both evidence-based medicine and emerging therapies to deliver customized, results-driven care. Known for his calm presence, clinical insight, and innovative mindset, Dr. Hessenthaler provides a safe space for patients to heal, grow, and reconnect with their fullest potential.