Sunday, October 4, 2026
Nearly a decade after Mount Sinai South Nassau purchased property in Wantagh, a new multi-specialty medical care facility is set to open this month, bringing expanded access to health services for Long Islanders.
The 63,000-square-foot, four-story facility, at 2020 Wantagh Ave., will offer specialty services including infusion, cardiology, women’s health, digestive health and orthopedics. The building, a $70 million investment by Mount Sinai South Nassau — a nonprofit teaching hospital in Oceanside with regional facilities across Long Island — is expected to serve roughly 1,200 to 1,500 patients a day, according to hospital officials.
The medical director will be Dr. Sunil George, who served as associate medical director at Mount Sinai’s location in Greenlawn, in Suffolk County.
Dr. Adhi Sharma, president and CEO of Mount Sinai South Nassau, said the facility will provide comprehensive and collaborative care, making it possible for patients to receive all the services they need under one roof while enabling physicians to work closely together.
“This space is a healing space, a welcoming space, a warm space for patients to come, oftentimes at a point of despair in their care journey,” Dr. Sharma said during a preview tour of the facility on June 25. “So, hopefully, they’ll feel the love and energy that was put into this space by our architects and designers.”
The hospital’s board of directors purchased the property in 2016, intending to convert an office building into a state-of-the-art medical facility. Mount Sinai addressed concerns about parking and traffic before finally receiving zoning approval from the Town of Hempstead in 2022.
Joseph Fennessy, a hospital board member and a Wantagh resident, said the board recognized the need for the facility. The vision, he said, was to replicate the level of care found in Manhattan hospitals while offering Long Island residents shorter commutes.
“We have a magnificent, beautiful facility,” Fennessy said. “Great specialties are going to be in here. Lots of people are going to be able to access great care.”
The facility features more than 70 patient consultation and examination rooms, as well as a hospital-grade air-filtration system to maintain a hygienic environment.
The fourth floor houses the infusion center for chemotherapy, along with labs for blood tests and a pharmacy. The infusion rooms are open spaces — by design, according to Kenneth Long, senior vice president and chief operating officer of the Mount Sinai Health System.
“Patients don’t like to be isolated — they don’t want to be in a room by themselves.” Long said. “So they actually, functionally, form their own support group for each other as they come in, because they often come in a couple times a week over some cadence of time, and they get to know each other.”
According to Long, 22 percent of Mount Sinai’s infusion patients come from east of the Wantagh facility. It will be Mount Sinai’s third infusion center on Long Island, joining locations in Greenlawn and Oceanside.
Examination rooms for surgery, endocrinology, rheumatology, hematology and oncology are also on the fourth floor.
The third floor will house the cardiac suite, which will offer imaging services including CT scans, nuclear imaging and echocardiograms, along with care in neurology, urology and gastroenterology.
The second floor will focus on women’s services, offering mammography, densitometry and ultrasound. It will also include orthopedic pain management and neurosurgery examinations, as well as OB-GYN and gynecologic oncology care, while imaging and radiology services will be located on the first floor.
Geri Barish, founder of Hewlett House, a nonprofit community learning resource center for cancer patients and their families in Hewlett, said it was “phenomenal” to have a facility nearby to support early detection through mammography screenings.
“What Mount Sinai has brought into the community — education, understanding, the relationship — they remove the fear,” Barish said.
The facility will open in phases, with the fourth floor set to open first on July 15, followed by the third floor the following week and the second floor the week after that. The first floor is expected to open Sept. 9, at which point the facility will be fully operational.
The Wantagh location will be the fifth Mount Sinai ambulatory multi-specialty center of its kind on Long Island, joining sites in Long Beach, Carle Place, Manhasset and Greenlawn. Hospital officials expect the new center to bring roughly 200 jobs to the community.
Hours of operation are expected to be 7 a.m. to 5 p.m. Monday through Friday, with expanded weekday hours phased in over time based on patient demand, Long said. The facility is not an urgent-care center. It is by appointment only, with no hospital beds for overnight stays and no emergency services offered.
Dr. Rajiv Datta, Mount Sinai South Nassau’s surgery department chair and the medical director of its cancer program, said that, years ago, patients had to travel to Manhattan for cancer care, often spending an entire day getting to and from appointments. The new facility, Datta noted, will enhance collaboration among physicians while creating a welcoming environment for commuting patients.
“Cancer care has completely changed,” Datta said. “Now it’s coming back to the community, and this is what the center can provide. Most of the patients can be seen here, with all the specialists and trials.”
