Rocky Mountain Movement Disorders Center

Leaders in treating Parkinson’s Disease, Dystonia, Huntington’s Disease, and other Movement Disorders.

The National Leaders in Treating Movement Disorders


Rocky Mountain Movement Disorders Center serves the largest number of patients with Parkinson’s Disease and other movement disorders in Colorado. We offer comprehensive and customized treatment plans for our patients to have the highest quality of life.

Dr. Rajeev Kumar, MD

Dr. Rajeev Kumar is one of the world’s foremost experts on movement disorders, with unparalleled experience and expertise treating and researching Parkinson’s disease, Huntington’s disease, Dystonia, and many other debilitating movement disorders. Trained at the renowned Mayo Clinic, Dr. Kumar has over two decades of experience working in the fields of Neurology and Movement Disorders, and as Medical Director of Rocky Mountain Movement Disorders Center and director of the Huntington’s Disease Center of Excellence both here and at the former Colorado Neurological Institute, he has solidified his status as one of the most trusted and respected professionals in the field.

Dr. Kumar has been dedicated to the care of patients with movement disorders in Colorado since 1998. He has been designated a Dystonia Doctor of Excellence by the Dystonia Medical Research Foundation. Dr. Kumar and his team serve individuals with movement disorders from early adulthood through advanced age. Our center is dedicated to helping patients with serious neurologic conditions achieve their life goals.


Rajeev Kumar, MD

Dr. Kumar founded Rocky Mountain Movement Disorders Center in 2007 and has been practicing in Colorado and Texas since 1998. He received his MD from the University of Saskatchewan, trained in neurology at the Mayo Clinic, and received fellowship training with Dr. Anthony Lang at the University of Toronto. Dr. Kumar has extensive experience treating Parkinson’s disease, Huntington’s disease, dystonia, and many other movement disorders, and he is a widely published author of these conditions. Dr. Kumar is an expert in movement disorders clinical research and has served as the principal investigator on more than 100 clinical trials. He feels fortunate to be able to help others while having fun in his work each day. Outside of the clinic, Dr. Kumar likes to ski and read.

Victoria Segro, MSN, ANP-C (Nurse Practitioner)

Ms. Segro is a certified adult practitioner after receiving her master’s degree in Nursing from the University of Colorado. She has worked in movement disorders neurology since 2000. Vicki is a member of the American Academy of Neurology and International Parkinson and Movement Disorder Society. She is one of the few nurse practitioners nationally certified as a clinical research investigator with the Parkinson Study Group and Huntington Study Group. Vicki has lived in Colorado since graduating from college, and she loves to spend time with her family and participate in the arts.

Sarah Robbins, MSN, ACNP-C (Nurse Practitioner)

After working in acute care, Sarah joined the RMMDC family in February 2019. She enjoys seeing and working with all types of movement disorders. Sarah believes in treating the patient as a whole and not just treating the disease. She is involved in clinical trial research to help discover more optimal symptomatic and disease modifying therapies. Outside of the clinic, Sarah enjoys the outdoors – primarily while mountain biking or skiing. She also loves to swim and spend time with her Goldendoodle, Trestle, as well as with friends and family.

Josette Pressler, LPN

Josette has over 45 years’ experience in nursing with 20 years in physical rehabilitation and the past 22 years working in movement disorders with Dr. Rajeev Kumar. Her expertise is with movement disorder exams, rating scales, clinical trials, and patient contact/communication. Josette educates patients, families, and community organizations regarding Parkinson’s disease. She enjoys many Colorado outdoor activities.

Peyton Mills, RN

Peyton is a registered nurse with an extensive background in trauma and emergency medicine prior to joining the RMMDC team in 2019. A few of her roles at RMMDC include assessment and implementation of treatment for a variety of patients, DBS programming, and performing infusions for clinical trials. Peyton most enjoys the connections she makes with her patients. In her free time, she enjoys hiking with her husband and Aussiedoodles, as well as spending time with friends and family.

Jessica Crall, Research Supervisor

Jessica has been working at Rocky Mountain Movement Disorders Center since 2013 after graduating from the University of Puget Sound with a BS in biology with an emphasis in neuroscience. She is currently a co-supervisor for the research department. Jessica enjoys being a coordinator because of the connections she makes with patients and families as well as the hope that research trials can provide. When she is not at work, Jessica enjoys cheering for the Colorado Avalanche and baking.

Karen Ortiz, Research Supervisor

Karen has been a Research Coordinator for 18 years and has worked on over 50 clinical trials involving multiple indications. She has been with RMMDC since 2017 and is a co-supervisor of the research department. Karen enjoys working on clinical research trials because she knows she is contributing to the advancement of medicine. She enjoys spending time with her family, being outdoors, and stand up paddle boarding.

Melissa Overbaugh, Accounting & Business Manager

Melissa has over 26 years of experience in accounting services, payroll services, tax preparation, budgeting, and small business management and administration. She works closely with the Research Department to ensure clinical trial accounting accuracy. Personal interests include almost anything outdoors with an expressive love for hiking and spending time with her four children, family, and friends.

Mona Shriver, Clinic Operations & Billing Manager

A Denver native, Mona is a former elementary school teacher and middle and high school coach who has worked in medical practices in one capacity or another for over 30 years. She acts as the practice manager and billing manager at RMMDC. When not spending time with her husband and 3 daughters, Mona is an avid reader and likes to walk/hike and work with a variety of crafts.

Clinical Trials Research Team

  • Parkinson’s Disease Clinical Trials

  • Lewy Body Dementia Clinical Trials

  • Huntington’s Disease Research Studies

  • We serve the largest number of patients with Parkinson’s disease and other movement disorders in Colorado

  • We are the National Parkinson Foundation Care Center for Colorado

  • We are the Huntington’s Disease Society of America Center of Excellence for the Rocky Mountain Region

Learn More about Lewy Body Dementia

Clinical trials are now being conducted of new investigational medications for Lewy Body Dementia to determine if they may safely improve symptoms.  There are currently no approved FDA-approved medications for treatment of this disorder.  Clinical trials assess drugs that are not yet approved by the FDA and by participating in these trials, individuals may obtain access to these investigational new medications.  To learn more about Lewy Body Dementia and clinical trials visit our Lewy Body Dementia page.

Talk to a Lewy Body Dementia Specialist By Phone

We Work Closely With

Despite Parkinson’s, Greg Climbed One of the Highest Mountains in the US

At the age of 59, with a 27-year history of Parkinson’s disease under his belt, Greg made it to the top; “Dr. Kumar has been so supportive of me reaching this dream that he even said he would climb it with me,” Hatstat explains. Mt. Harvard, near Buena Vista, is a very difficult climb. It’s the third-highest peak in Colorado and the fourth-highest in the contiguous United States, rising 4,400 feet in 6.5 miles to a summit of 14,433 feet.”


Huntington’s Research

We are currently recruiting patients with early to mid-stage Huntington’s for a clinical trial, as well as patients of various gene statuses (unknown, positive, and negative) for an observational trial.


Parkinson’s Research

We are currently conducting multiple clinical trials and recruiting both early and advanced Parkinson’s patients from across the nation.


Dystonia Treatment

Patients with diverse types of dystonia such as blepharospasm, limb, and cervical dystonia, can benefit from treatment with Botox.