Meet the Team!

  • Ravi Shah, M.D., is a board-certified neurologist specializing in headache medicine and sports concussion care. Born in New York City and raised primarily in Tampa, Florida, Dr. Shah earned his medical degree from the University of South Florida College of Medicine. He completed his neurology residency at the University of Colorado Health Sciences Center, where he served as chief resident during his final year. Dr. Shah is the founder of Neurology of the Rockies, L.L.C., and serves as Neurology Director at Castle Rock Hospital. He is widely recognized for his expertise in botulinum toxin (Botox®) injections, treating conditions such as chronic migraine, spasticity, and dystonia. A national speaker and trainer, Dr. Shah educates neurologists across the country on advanced injection techniques. He has worked extensively with the NFL and currently serves as team neurologist for the Denver Broncos.  In his free time, Dr. Shah enjoys spending time with his family and is an avid tennis player.

  • Jeff Tam Sing, M.D. is a native of Honolulu, Hawaii.  He obtained his medical degree at the University of Hawaii, John A. Burns School of Medicine.  His neurology residency training was done at Oregon Health and Science University in Portland Oregon. He then moved to Denver where he completed a fellowship in neuromuscular medicine at the University of Colorado Health Sciences Center.  Dr. Tam Sing treats general neurological conditions, specializing in neuromuscular disorders. Dr. Jeff Tam Sing is a board certified neurologist.

  • Karen Karwa, M.D. was born and raised in Mumbai, India. She attended medical school at Lokmanya Tilak Medical College in Mumbai. She completed her neurology residency at the Medical University of South Carolina where she served as Chief Resident. Dr. Karwa continued on to the Cleveland Clinic Foundation in Ohio to complete a fellowship in Neuromuscular Medicine. Dr. Karwa provides comprehensive management for a wide range of neurological conditions and has a special interest in managing patients with neuromuscular conditions. She also served as Honorary Medical Chair for the Myasthenia Gravis walk in Colorado. Dr. Karen Karwa is a board certified neurologist and neuromuscular specialist.

  • Dr. Luisa Solis-Cohen is a board-certified Neurologist and Movement Disorder specialist. Raised in New York, she graduated from Brandeis University with a BS in Neuroscience and then pursued research in Cognitive Neurology at the University of Pennsylvania. She earned her medical degree from the University at Buffalo School of Medicine and Biomedical Sciences, graduating magna cum laude in 2012. Her Neurology Residency and Movement Disorder Fellowship were completed at Beth Israel Deaconess Medical Center in Boston, a Harvard training program. She was Chief Resident, the recipient of multiple teaching and science awards and inducted into the Gold Humanism Honor Society. Dr. Solis-Cohen moved with her family to Colorado where she established a movement disorder clinic in 2017. Her clinical interests include Parkinson’s disease, essential tremors, dystonia, and therapeutics including deep brain stimulation (DBS) and botulinum toxin injections. She participates in community outreach and clinical research related to Parkinson's disease, DBS therapy and palliative care. Dr. Solis-Cohen is dedicated to individualized, compassionate patient care.

  • Steve Savinoff, M.D. is a first generation immigrant from Russia, having been born and raised in Los Angeles, California. He began his journey to become a physician early, skipping from eighth grade straight to college at the ripe age of thirteen and earning his BS in Biology from the California State University Los Angeles. After graduation, he engaged in stem cell research at Cedars-Sinai Medical Center, with a focus on ALS and glioblastoma. He then went on to Medical School at The Ohio State University and completed Neurology Residency at the University of Colorado. He moved back to California to pursue an Epilepsy Fellowship at Stanford University before moving back to Colorado to join Neurology of the Rockies. Dr Savinoff has additional training in and has published on Functional Seizures, previously called "Pseudoseizures" and "Psychogenic Nonepileptic Seizures / Attacks / Spells." In his free time, he is a modern board game enthusiast. 

  • Sarah Smith, PA-C is from beautiful Woodland Park, CO.  She received her Bachelor of Arts degree in Kinesiology from University of Colorado and received her Master’s in Physician Assistant Studies from Samuel Merritt University.  Sarah is a member of Colorado Academy of Physicians Assistants, the American Academy of Physician Assistants, and is certified by the National Commission on Certification of Physicians Assistants.

  • Rachelle Webster, PA-C has many years of experience treating headaches and migraine, including Botox injections for chronic migraine. She was born in Wyoming but has spent most of her life in Colorado. She received her bachelor’s degree in 1998 from The University of Colorado and graduated with her PA degree from the University of Alabama at Birmingham in 2000. Before joining Neurology of the Rockies, Rachelle worked in Plastic Surgery, Dermatology and Family Medicine. She is married to a wonderful husband and is the proud mother of her teenage son and her lovely Golden Retriever. In her spare time, she enjoys spending time with her family, hiking, biking and painting. She is particularly active in raising awareness about human trafficking and supporting various rescue homes and organizations who help trafficking victims. She has been on 2 mission trips in Juarez and Nicaragua, one of which involved serving trafficking victims.

  • With nearly 17 years of experience, Cela Kobel is a dedicated Physician Associate. She holds a Master of Medical Science and Physician Assistant Studies degree from Midwestern University in Downers Grove, Illinois. Cela initially honed her skills in family medicine before transitioning to neurology. A resident of Colorado for almost 20 years, she is originally from Israel. Outside of her practice, Cela finds joy in spending time with her family, gardening, exercising, drawing, and listening to her children's playing Piano.

Meet the newest addition to our team

Michlene Passeri, MD

Dr. Passeri is a board-certified neurologist and fellowship-trained multiple sclerosis specialist dedicated to providing compassionate, personalized care for patients with neurological conditions. 
Originally from Houston, Texas, Dr. Passeri earned her medical degree from Texas A&M College of Medicine before completing her neurology residency at the Barrow Neurological Institute in Phoenix, Arizona, where she served as Chief Resident during her final year. She then completed fellowship training in Multiple Sclerosis and Neuroimmunology at the University of Colorado and is a Multiple Sclerosis Certified Specialist (MSCS) designated through the Consortium of Multiple Sclerosis Centers (CMSC).
In addition to her expertise in multiple sclerosis and related disorders, Dr. Passeri cares for patients with a wide range of neurological conditions and is committed to improving their quality of life.
Outside of medicine, she enjoys outdoor activities with her family — running, biking, hiking, and skiing — and values staying active while exploring Colorado. She also treasures time spent with her family.