Mount Sinai Obstetrics, Gynecology and Reproductive Science

750 Montauk Hwy, West Islip, NY 11795

Maternal-Fetal Medicine Obstetrics & Gynecology West Islip

Call (631) 376-1010 Book online Website Directions

About

Mount Sinai Health System's OB/GYN service, offering pregnancy and high-risk obstetric care, fertility treatment, gynecologic surgery and cancer care through hospital-based and community practices across the metro area.

Services

Pregnancy & birthMaternal-fetal medicineFertility (REI)Gynecologic oncologyFibroid careEndometriosis & pelvic painMenopause careUrogynecology

Providers at this location (1)

Athanasios Antoniadis, MDObstetrics & Gynecology Catholic Health Physician Partners – Women's Health (OB/GYN) · West Islip

Other locations

Mount Sinai Obstetrics, Gynecology and Reproductive Science 8268 164th St Rm B265, Jamaica 11432 14 providers · Obstetrics & Gynecology · Maternal-Fetal Medicine Mount Sinai Obstetrics, Gynecology and Reproductive Science 2017 Deer Park Ave, Deer Park 11729 2 providers · Maternal-Fetal Medicine · Obstetrics & Gynecology

Nearby practices in West Islip

Catholic Health Physician Partners – Women's Health (OB/GYN) 1000 Montauk Hwy, West Islip 11795 29 providers · Obstetrics & Gynecology · Gynecology Stony Brook Medicine OB/GYN (University Associates in Obstetrics & Gynecology) 320 Montauk Hwy, West Islip 11795 7 providers · Obstetrics & Gynecology · Gynecology Women's Health Office at 320 Montauk Highway 320 Montauk Highway, South Bay OBGYN PC, West Islip 11795 7 providers · Obstetrics & Gynecology · Gynecology Women's Health Office at 180 Sunrise Hwy 180 Sunrise Hwy, West Islip 11795 4 providers · Women's Health Nurse Practitioner · OB/GYN Nurse Practitioner East Coast Fertility, P.C. 500 Montauk Hwy, Suite A, West Islip 11795 1 provider · Reproductive Endocrinology & Infertility · Gynecologic Oncology Caitlin Henderson, MLP — Office 500 Montauk Highway Suite W, Sarah Schwartz MD PLLC, West Islip 11795 1 provider · Women's Health Nurse Practitioner · OB/GYN Nurse Practitioner

All women's health providers in West Islip · All providers in New York

Practice details

Phone: (631) 376-1010
Fax: (631) 376-6156
Area: West Islip · Suffolk County · Long Island
Legal name: Mount Sinai School Of Medicine
Hospital affiliations: The Mount Sinai Hospital
Practice NPI: 1336616549

Sources: [1] [2], NPI Registry, CMS.

Insurance accepted (verified)

Network list published by Mount Sinai Health System (Manhattan, Queens, Brooklyn hospitals). Mount Sinai Health System facility payer grid dated 08/11/2026 (hospital participation for The Mount Sinai Hospital/Queens, Downtown, Brooklyn, Morningside/West). Physician services are billed separately; employed physicians' plans are shown on their Find a Doctor profiles. Not participating per grid: Affinity by Molina, UnitedHealthcare Community Plan (Medicaid/CHP/Exchange Compass), Anthem Medicare and HealthPlus Exchange, MVP Medicaid/Medicare/Essential. Humana Medicare HMO listed only for transplant services. Original Medicare/Medicaid FFS are covered on separate Mount Sinai pages and are not recorded here. Plans reported in network for a clinician at this address in the NYS Provider & Health Plan Look-Up (data as of 2026-10-16). Sources: [1] [2] [3] Checked 2026-11-01.

Confirm with the office that they take your specific plan before your visit. Networks differ by plan product and change often.