Mount Sinai South Nassau
Internal Medicine • Long Beach, NY • Since 1928
Information from public sources; not independently verified. Confirm hours, insurance and appointment availability with the clinic.
Last gathered July 11, 2026. How our information is sourced · Report incorrect information
About
Mount Sinai South Nassau (formerly Mount Sinai South Nassau) is a large, nonprofit teaching hospital in Oceanside, NY, with 455 beds and 3,000 employees. It provides comprehensive acute-care services, including cardiac, oncologic, orthopedic, bariatric, pain management, mental health, and emergency care, plus extensive outpatient centers. The facility operates as a designated Stroke Center and Comprehensive Community Cancer Center, and it offers advanced radiosurgery technologies (Novalis Tx and Gamma Knife Perfexion). Mount Sinai South Nassau is a major regional provider with multiple facilities on Long Island, including locations in Oceanside and Long Beach. For primary care in Long Beach, the hospital hosts affiliated services and maintains contact channels (info@southnassau.org; main phone numbers).
Services Offered
Insurance & Payment
Not published.
Languages Spoken
Not published.
FAQs
No Insurance?
At Mount Sinai South Nassau - Long Beach, Primary Care, we offer quality health care you can afford. We are an approved provider for most major insurance plans. But if you do not have insurance, we have programs for eligible patients that assist with reduced-rate care based on your ability to pay, as well as connections to facilitated-insurance enrollment programs.
Social Media
Photos
Photos published by Mount Sinai South Nassau showing the internal medicine practice in Long Beach, NY.
What Patients Say
Overall sentiment across review platforms: mixed
- Birdeye (Family Medicine): 2.2 / 5 stars (77 reviews)
- Birdeye (Emergency Dept): 3.3 / 5 stars (12 reviews)
- US News & World Report (Family Medicine): 3.4 / 5 stars (79 reviews)
Patients praise
- Some patients report kind and attentive care from individual doctors and staff
- Local accessibility for the Long Beach community
- Professional care reported for specific procedures
Common complaints
- Long wait times for appointments and emergency services
- Concerns regarding staff communication and responsiveness
- Issues with cleanliness and facility maintenance
- Reports of dismissive or unprofessional behavior by staff
- Disjointed or uncoordinated care experiences
"Mt Sinai is excellent! Caring staff, attentive, accommodating, professional, and you will feel well taken care of here."
- Birdeye Patient Review"Took my daughter to the ER Arrived at 6:15. Was triaged and then sat the the waiting room til 12:25... This is totally unprofessional. The staff doesn’t come to check on you."
- HospitalStats Patient Story"Awful. Waited in the waiting room with chest pains and when I was finally taken back, I was put in a hallway with a bunch of people for about 10 hours."
- Yelp Patient ReviewSynthesized from public review platforms as of Jul 11, 2026 - sources: [1][2][3][4].
In the News
- Outpatient Locations | Mount Sinai - New York
- Search - Apr 23, 2026
- Mount Sinai South Nassau – Long Beach - Jun 11, 2026
- Mount Sinai South Nassau | Mount Sinai - New York - Sep 16, 2025
Information sourced from the clinic's website as of July 11, 2026.
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