Mount Sinai Doctors–Long Island

We provide the highest quality care at locations in Greenlawn, Nesconset, Commack, and Bay Shore. Offering more than 20 specialties, our experts combine advanced treatments with personalized attention. 

Customized Services

Welcome to Mount Sinai Doctors-Long Island, where we offer convenient access to world-class medicine so you can keep your health care on track.

With locations in Commack, Greenlawn, and Nesconset, our physicians provide personalized attention, drawing on advanced treatments and emerging research to customize the right care plan for you.  

 Coming Soon

We are opening a new office in West Islip in September that will provide Cardiology and Electrophysiology services.

Skilled Medicine Close to Home

Whether you walk in the door of one of our Long Island practices or the Fifth Avenue entrance of The Mount Sinai Hospital, you gain access to the same academic medicine and highly trained specialists for which the Mount Sinai Health System is known.

Our local offices provide a superb level of primary care, as well as services in cardiology, oncology, and women’s health. Our Advanced Radiation Centers of New York location at Greenlawn treats a wide range of cancers with leading-edge technologies.


5 Cuba Hill Road
Greenlawn, NY 11740
East Entrance – Suite 200
West Entrance – Suite 100

Phone: 631-628-5000

61 Southern Boulevard
Nesconset, NY 11767
Phone: Cardiology – 631-659-1800
Phone: Gastroenterology – 631-659-1850

66 Commack Road, Suite 103
Commack, NY 11725

Phone: 631-659-1620
Temporarily closed – reopening fall 2020

Advanced Radiation Centers of New York
5 Cuba Hill Road, Suite 400
Greenlawn, NY 11740

Coming soon….

500 Montauk Highway, Suite S
West Islip, NY 11795

Update on the Novel Coronavirus (COVID-19)

Read about Mount Sinai Health System's response to this newly discovered disease, and what you need to know

On Call 24/7

Our physicians and staff are committed to providing the most comprehensive care for our patients.
Access to a physician is available 24/7.

Cuba Hill Road, Greenlawn

59 Southern Boulevard Nesconset

61 Southern Boulevard Nesconset,

66 Commack Road Commack

61 East Main Street Bay Shore