Executive Leadership
Learn all about the Executive Leadership team at LISH.
Aaron Clark, PharmD, AAHIVE, 340B ACE
Chief Executive Officer
Aaron Clark is the CEO of Long Island Select Healthcare, bringing a wealth of experience and a passion for advancing healthcare delivery. Before assuming this role, Aaron served as Vice President of Health Center Operations at AndHealth, where he played a pivotal role in designing and implementing an innovative specialty care and pharmacy model for Community Health Centers (CHCs). His efforts significantly improved access to care and medications while driving better health outcomes for patients.
As the owner of AKC Healthcare Solutions, Aaron provided expert consulting services to CHCs, federal grantees, and other healthcare partners, focusing on health center operations, pharmacy implementation, strategic planning, and business development.
Prior to this, Aaron dedicated nearly a decade to Equitas Health, an Ohio-based CHC, where he held several senior leadership roles, including Chief Operating Officer, Chief Healthcare Operations Officer, and Chief Pharmacy Officer. In this capacity, Aaron led the development of pharmacy services, opening seven retail and specialty-accredited pharmacy locations. He also led a variety of departments, including medical, dental, mental health, administrative services, external affairs, and strategy. During the COVID-19 pandemic, Aaron successfully guided Equitas Health through the transition to telehealth, implemented a comprehensive COVID-19 testing strategy, and spearheaded community immunization efforts.
Aaron holds a Doctor of Pharmacy degree from Ohio Northern University and is a recognized national expert on pharmacy-related matters and the 340B Drug Pricing Program.
In Aaron’s words: “Healthcare is a constantly evolving field, with new technologies and innovations emerging daily. I’m thrilled to lead the Long Island Select Healthcare team as we navigate these changes and ensure the highest quality care for every patient, now and into the future.”
Lois Stoddard, MBA
Chief Financial Officer
Lois joins LISH with over 25 years in financial leadership roles. She has a Bachelor’s Degree from the University of Michigan, a Master’s Degree from the Manhattan School of Music as well as a second Master’s Degree in Business Administration from Hofstra University..
Alexandra Manetta, MHA
Vice President of Operations
Alexandra joins LISH with 10 years of experience from a variety of healthcare settings. She holds a Master’s Degree in Health Administration and Bachelor’s Degree in Health Science from Hofstra University.
Jaclyn DiMattei, ANP-C
Assistant Chief Medical Officer
Jaclyn DiMattei is a Nurse Practitioner proving primary care services at our Central Islip & Hauppauge locations since 2017.
Jaclyn earned her Master of Science degree as an Adult-Gerontology Nurse Practitioner from Stony Brook University. She obtained her Bachelor of Science degree in Nursing from Long Island University. She received her post master’s degree as a Psychiatric Mental Health Nurse Practitioner in 2022.
Prior to joining LISH in 2017, Jaclyn worked at Northwell Manhasset Hospital in their emergency department as an RN for 6 years. Additionally, she worked as a sexual assault nurse examiner for 2 years at Northwell University Hospital.
Jaclyn was promoted to Assistant Chief Medical Officer in 2023.
Josephine Pizzurro – Coccaro, NP
Director of Virtual Care
Josephine is a Pediatric Nurse Practitioner and Registered Nurse with over 20 years of experience in healthcare. She holds a Master’s Degree from Stonybrook University and a Bachelor’s Degree from Molloy College.
Steven M. Asofsky, MA, LSP, CCC/TSHH
Rehab Supervisor
Steve holds a Master’s Degree in Speech-Language Pathology from Hofstra University. He holds a Certificate for Clinical Competence from the American Speech and Hearing Association, and is permanently certified through the New York State Education Department as a Teacher of the Speech and Hearing Handicapped. Steve is also licensed through New York State as a Speech-Language Pathologist.
Spiro Theoharakis, MD
Lead Psychiatrist
Dr. Theoharakis is a Board-Certified Child, Adolescent, and Adult Psychiatrist who provides mental health assessments, medication management, and treatment planning. Dr. Theoharakis received his BA in Psychology at New York University, his medical degree at the Albany Medical College, and completed his internship and residency training at North Shore University Hospital, Cornell University Medical College.
Doreen Koronios
Manager, Executive Office & Affairs
Doreen brings over 35 years of administrative, marketing, and project management experience to her role at LISH. She holds a Bachelor’s Degree in Marketing from the University of Arizona.
