Mary Kay Dyes, M.D.
Dr. Dyes is a board-certified child neurologist with Adult and Child Neurology Medical Associates since 1991. After completing a full pediatric residency at Los Angeles County/University of Southern California, Dr. Dyes then finished a neurology residence and child neurology fellowship at Harbor/UCLA Medical Center. She received her medical degree from University of Texas at Houston. In her clinical practice, Dr. Dyes sees a wide variety of general pediatric neurology conditions, including migraine, tic disorders/Tourette’s syndrome, cerebral palsy, seizure disorders, autism spectrum disorder, attention deficit disorder, and other disorders of muscle and the nervous system. Dr. Dyes is currently the Medical Director for Pediatric Neurology at Long Beach Memorial Miller Childrens and Womens Hospital. Outside of work, Dr. Dyes enjoys playing tennis, hiking and camping, and spending time with her husband and dogs.
Thanh L. Le, M.D.
Dr. Le is a board-certified child neurologist with Adult and Child Neurology Medical Associates since 1997. He has many years of experience treating adults and children with a wide range of general and complex neurological condition. He presently focuses the majority of his practice on Pediatric Neurology seeing outpatients, as well as doing inpatient neurology consultations at Miller Children’s Hospital. Dr. Le has particular expertise in Autism Spectrum Disorders, ADHD, childhood migraine, epilepsy, Tic Disorders, along with many other development conditions and disorders. He also has several years of experience in programming the Vagus Nerve Stimulation implants (for Epilepsy) and Deep Brain Stimulation implant (for Parkinson, Essential Tremors, and Dystonia). Patients are seen by referral from their primary physicians. Patients may be seen in either our Costa Mesa office or the Long Beach office.
Nicole Cobo, M.D.
Dr. Cobo is a board-certified Child Neurologist/Epileptologist with Adult and Child Neurology Medical Associates since 2014. Dr. Cobo trained at the University of California Los Angeles in Pediatric Neurology and Epilepsy. She previously graduated from Loyola University Chicago, Stritch School of Medicine. Her clinical practice includes general pediatric neurology with a special interest in epilepsy in infants, children, and young adults. Outside of work, Dr. Cobo enjoys spending time with her husband and three daughters.
Jasmin Dao, M.D., Ph.D.
Dr. Dao is a board-certified neurologist with special qualification in child neurology, practicing with Adult & Child Neurology Medical Associates since 2018. She attended the University of California, San Diego where she earned a Bachelor of Science degree in Bioengineering. She played collegiate tennis for UCSD, where she was a top singles player, team captain, UCSD National Scholar-Athlete, and 3-time CCAA champion. She received her MD/PhD at the NIH-funded Medical Scientist Training Program at UC Irvine School of Medicine. She then completed pediatric residency at Children’s Hospital Oakland and her fellowship in pediatric neurology at UC San Francisco. Her clinical areas of practice include general pediatric neurology with a special interest in migraines, sports-related concussion, and epilepsy. In her spare time, she enjoys spinning, pilates, and spending time at the beach with her husband and daughter.
Karissa Poppell, PA-C
Karissa graduated summa cum luade from the University of Florida with a Bachelor of Arts degree in Health Education and Human Performance. She went on to earn a Master of Physician Assistant Practice from the Keck School of Medicine of USC. Karissa chose an advanced clinical rotation during her PA program at Fullerton Neurology and Headache Center. This ignited a great passion for the field of neurology. After graduation, Karissa pursued her goals of working in the fields of pediatric neurology and neurosurgery at Children’s Hospital of Los Angeles (CHLA). She later rejoined the Fullerton Neurology practice, now as a certified PA, where she participated in research studies for various neurological conditions including multiple sclerosis and migraine. In July of 2014 the opportunity arose to return to the pediatric realm at Adult and Child Neurology. Special interests include epilepsy, vagal nerve stimulator (VNS), multiple sclerosis, migraine, and concussion/TBI. When Karissa isn’t rounding on kids in the hospital, she loves baking, enjoys concerts with her husband, and is an avid runner with her dog Kona.
Jacqueline Ngo, MD
Dr. Ngo is a board-certified child neurologist/epileptologist who joined the practice in 2025. She's a California native who completed a master's degree in Narrative Medicine at Columbia University. She completed medical school, pediatric neurology residency, and epilepsy fellowship at University of California, Los Angeles. She enjoys powerlifting, reading novels, doing crosswords, writing, and spending time with her cat, Beans.
Jasmin Ray, PA-C
Jasmin graduated summa cum laude from Arizona State University, earning a Bachelor of Science in Psychology with a minor in Biological Sciences. During her undergraduate training, she conducted research with the Arizona Twin Project, focusing on the influence of parenting practices on child diurnal cortisol rhythms. For her contributions to research, she was honored as the Dean’s Medalist for her department. At this time, she also worked at Phoenix Children’s Hospital on the Pediatric Epilepsy Monitoring Unit, where she gained meaningful experience supporting children and families navigating seizure disorders. This role strengthened her interest in pediatric neurology and patient-centered care. She went on to earn her Master of Medical Science in Physician Assistant Studies from Chapman University. During her training, she completed an elective rotation in pediatric neurology with ACNMA—an experience that solidified her passion for the field and the team. After graduation, she eagerly returned to join the practice as a certified Physician Assistant. Her special interests include epilepsy, vagal nerve stimulation (VNS), migraines, and ADHD. When she’s not caring for patients, you can find her at her local pottery studio or in the kitchen trying new recipes.
Rayleene Miranda, PA-C
Rayleene graduated from University of California, Los Angeles with a degree in Psychobiology. Growing up in her family’s care home for individuals with intellectual disabilities, autism, and other complex neurological conditions inspired her early passion for advocacy and patient care. She worked as a Direct Support Professional in her family’s care home and participated in autism research at the UCLA Center for Autism Research and Treatment (CART) in college, further strengthening her commitment to individuals with neurodevelopmental disorders.
She went on to earn her Masters of Physician Assistant Studies from Chapman University and completed her elective rotation at Adult and Child Neurology, which cemented her dedication in pediatric neurology. She has special interests in caring for patients with autism, epilepsy, and migraines, and is dedicated to providing compassionate, family-centered care to children and their families. Outside of medicine, she enjoys crocheting, singing karaoke, and spending time with friends and family at Disneyland.