Hamden (203) 288-8300 Branford (203) 643-0620 Milford (203) 301-4349 Norwalk (203) 939-9688 Greenwich (203) 939-9688
Meet the Specialists

Expert Care from People Who Care

Our board-certified sleep physicians and psychologist bring decades of combined expertise — and a deep commitment to treating every patient with respect, integrity, and total privacy.

100% Board-Certified
AASM Accredited Center
Treating Ages 7 & Up
RPSGT-Certified Technicians
Our Physicians

Board-Certified Specialists

Every member of our clinical team is board-certified and brings specialized expertise in sleep medicine and related disciplines.

Neelam Gupta
Neelam Gupta, M.H.A.
Managing Director
Nina Konstantinova
Nina Konstantinova, M.D.
Physician, Medical Director, Board Certified Sleep Medicine
John Cline
John Cline, Ph.D.
Clinical Psychologist, Diplomate American Board, Sleep Medicine
Eddy Quinde
Eddy Quinde, R.P.S.G.T.
Clinical Sleep Care Manager
Sergey Zasypayko
Sergey Zasypayko, M.D.
Sleep Medicine Specialist
Thomas Szwejkowski
Thomas Szwejkowski, PA-C
Physician Assistant
Gabriel Sarah
Gabriel Sarah, MD
Sleep Medicine Specialist
Cierra Fabein
Cierra Fabein, APRN
Nurse Practitioner
Abigail Edwards
Respiratory Therapist
Abigail Edwards, RRT
Registered Respiratory Therapist
Rebecca Arvelo
Rebecca Arvelo, CPSGT
Certified Polysomnographic Technician

Neelam Gupta, M.H.A.

Ms. Neelam Gupta obtained her Master in health care administration (MHA) from University of New Haven in 1994. She has an extensive experience in the field of health care. She has held senior positions in various healthcare organizations. She is responsible for over all administration at the centers to ensure the best quality of care to our patients and their family members. This is the reason our facilities and services are well liked and recognized by physicians, patients and their family members.

Nina Konstantinova, M.D.

Dr. Nina Konstantinova completed her residency in Internal Medicine from Jamaica Hospital in New York. She completed her fellowship in Sleep Medicine from Sleep Disorders Institute in New York. She is board certified in Internal Medicine and Sleep Medicine and has been working as Medical Director for Sleep Disorders Center of Connecticut since 2007. Dr. Konstantinova has extensive experience in treating all aspects of sleep disorders in adult as well children.

John Cline, Ph.D.

Dr. John Cline obtained his Ph.D. from University of Toledo, OH in 1984. He earned his board certification in Sleep Medicine in 2005. Dr. Cline has extensive experience particularly in the area of Insomnia providing state of the art care to patients since 1985. His peers and professional colleagues have awarded him numerous professional honors and recognitions. Dr. Cline works with team of sleep experts at the center rendering care particularly in the field of Insomnia and CPAP acclimatization (PAP-NAP).

Eddy Quinde, R.P.S.G.T.

Sergey Zasypayko, M.D.

He is a board certified sleep physician with extensive training and excellent clinical experience.

Thomas Szwejkowski, PA-C

Gabriel Sarah, MD

Cierra Fabein, APRN

Cierra Fabien, FNP-C, is a board-certified family nurse practitioner with clinical experience in primary care and sleep medicine. She earned her Master of Science in Nursing, Family Nurse Practitioner, from the University of Memphis and is currently pursuing her Doctor of Nursing Practice at Florida State University in the Lifestyle Medicine track, with an anticipated graduation in July 2026. Her clinical interests include sleep and lifestyle evidence-based interventions to improve patient outcomes. She is passionate about integrating sleep medicine with preventive care to support long-term health and overall wellness.

Abigail Edwards, RRT

Rebecca Arvelo, CPSGT

Our Values

The Principles That Guide Us

Everything we do is anchored in four core commitments to every patient we serve.

Excellence

AASM accreditation ensures we meet the highest measurable standards in sleep medicine every single day.

Compassion

We treat every patient as an individual — listening carefully, explaining thoroughly, and caring deeply.

Privacy

Total patient confidentiality is non-negotiable. Your privacy is respected at every touchpoint of your care.

Integrity

Honest communication, transparent care plans, and always putting your health outcomes first.

Clinical Support

Our Expert Support Team

Beyond our physicians, every patient benefits from a highly trained multidisciplinary support team.

RPSGT Technicians

Registered polysomnographic technicians certified in sleep study administration.

Care Coordinators

Dedicated to guiding you seamlessly from referral to treatment follow-up.

Patient Services

Friendly support staff at all 5 locations ready to answer questions and schedule visits.

Insurance & Billing

Our billing specialists work with most major insurers to simplify your coverage and claims.

Meet Us In Person

Ready to Meet Your Specialist?

Our team is accepting new patients at all 5 Connecticut locations. Book a consultation and take the first step toward truly restorative sleep.

Schedule a Consultation
Find Us

Our 5 Locations

Hamden
2447 Whitney Ave, Suite 202, CT 06518
(203) 288-8300
Milford
174 Cherry Street, CT 06460
(203) 301-4349
Branford
14 Business Park Drive, CT 06405
(203) 643-0620
Norwalk
83 East Ave, Suite 300, CT 06851
(203) 939-9688
Greenwich
81 Holly Hill Lane, 3rd Floor, CT 06830
(203) 939-9688