A registered and board certified physician assistant, Ms. Helms joined our practice in August 2015.  She pursued a Health Science major at SUNY-Stony Brook, and achieved both a Bachelors of Science degree in Health Sciences and a Masters of Science degree in Physician Assistant Studies at Touro College - School of Health Sciences, in 2012.  Due to her academic success, Eun Ah was recognized on both the Dean's list and Honor Roll.

Eun Ah joined us after working two years in primary care, and her interests include all aspects of general neurology as well as the administration therapeutic injections such as nerve blocks, trigger point injections, and Botox for chronic migraines. 


Eun Ah's patients always comment about the compassionate and thorough care that she provides.

Ms. Conway is a board-certified Adult Gerontological Nurse Practitioner who joined our practice in August 2022.  She began her career as a Registered Nurse after graduating from Molloy College in 2017. As a Registered Nurse, Sarah worked with acutely ill patients hospitalized at St. Francis Hospital, and always strived to provide compassionate and efficient care.  In May 2021, Sarah graduated from Stony Brook University with a Master’s of Science from the Adult Gerontological Nurse Practitioner program. 

Prior to joining our practice, throughout her 5 years of combined experience as a Registered Nurse and now as a Nurse Practitioner, Sarah worked in several different departments at the hospital.  She has cared for patients with a wide variety of medical diagnoses, including many neurological disorders.

Sarah's interests include therapeutic injections for treatment of chronic headaches, as well as general neurology. Her goal is to improve the quality of life of her patients by working together to create effective treatment plans.

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Dr. Maltese, our current medical director, joined the practice during the summer of 2014.  Board certified in Neurology and Sleep Medicine, his interests include general neurology, headache, dementia, neurophysiology, and sleep disorders.  He received his Doctor of Osteopathic Medicine degree from the University of Medicine and Dentistry of New Jersey in 2008 and completed an internship in Internal Medicine at Morristown Memorial Hospital in Morristown, NJ.  Dr. Maltese completed his residency in Neurology at Stony Brook University Hospital, where he served as chief resident during his final year.  He pursued additional training with fellowships in Neurophysiology (EEG and EMG) and Sleep Medicine at Stony Brook.


Dr. Maltese's research has been presented at the American Academy of Neurology Annual Convention and he has participated in The College of New Jersey's Residential Education "Distinguished Alumni Panel."  He enjoys teaching residents and medical students, and is a voluntary Clinical Assistant Professor of Neurology at Stony Brook.


Dr. Maltese is affiliated with Stony Brook University Hospital.

Dr. Todd J. Maltese, D.O.

Mark Ortiz, RPA-C

Sarah Conway, NP

Mr. Ortiz is a board-certified physician assistant who joined our practice in June of 2022. He graduated from Stony Brook University with a degree in Health Science with a concentration in Emergency and Critical Care, and from Salus University in Philadelphia with a Masters of Medical Science degree.  Mark has excelled academically, graduating both programs with honors and being the recipient of the Clinical Excellence Award from Salus University and was inducted into the Pi Alpha National Honor Society for Physician Assistants.

Mark joined us with five years of general outpatient neurology experience and previously served as the Chief Physician Assistant at his prior practice. His interests include, but not limited to, headache disorders, neuroimmunology, integrative pain management, and neuropsychological disorders.  Mark is skilled in Botox injections for chronic migraine headaches, axillary/palmar/plantar hyperhidrosis, blepharospasm and certain forms of dystonia.  In addition, he performs trigger point injections and a variety of joint injections and nerve blocks for both acute and chronic pain processes.

Mark is a thorough and comprehensive clinician who prioritizes communication and developing a rapport to individualize the treatment he offers.

Eun Ah Helms, RPA-C, MPAS

Call Us:  631-737-0055

Mid-Suffolk Neurology & Sleep Medicine