1. Home
  2. Directory
  3. New York
  4. West Islip
  5. Obstetrics Gynecology
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MR. WILLIAM A MAIORINO MD
NPI 1740392174
Obstetrics & Gynecology - Gynecology in West Islip, NY

Active since August 31, 2006
320 MONTAUK HIGHWAY, SOUTH BAY OBGYN PC, WEST ISLIP, NY 11795(631) 587-2500(631) 587-0292 Get Directions Write a Review

NPPES record last updated: September 27, 2026. Verified against the NPPES registry weekly; last sync: September 27, 2026.

About Mr. William A Maiorino Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. WILLIAM A MAIORINO MD (NPI 1740392174) is an individual gynecology provider in West Islip, New York, licensed in New York (0830691) and active in the NPI registry since August 2006.

NPPES Registry Identity

NPI1740392174
Entity TypeIndividualMale
Primary Taxonomy207VG0400X
Provider Legal NameMR. WILLIAM A MAIORINOCredential: MD
Location Address320 MONTAUK HIGHWAY, SOUTH BAY OBGYN PCWest Islip, NY 11795-4401
Mailing Address45 Research Way, University Associates ObgynEast Setauket, NY 11733-6401 · (631) 675-2125 · Fax (631) 675-2624
Phone(631) 587-2500
Fax(631) 587-0292
Sole ProprietorNo
Enumeration DateAugust 31, 2006
Last NPPES UpdateSeptember 27, 2026
✔ NPI 1740392174 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207VG0400X
License✔ Licensed in NY · 0830691
Definition
A physician who specializes in diagnosis, treatment, and management of patients with gynecologic conditions. Source: National Uniform Claim Committee
320 MONTAUK HIGHWAY, West Islip, NY 11795
Open in Google Maps ↗

Other Identifiers 3

Other0033122NY · Ghi
Medicaid399660NY
Other133871NY · Bcbs

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. JACQUELINE A AMMIRATA MD
Obstetrics & Gynecology
320 MONTAUK HIGHWAY, SOUTH BAY OB GYN PC
WEST ISLIP, NY 11795
Suffolk County (631) 587-2500
MR. PETER A JUDGE MD
Obstetrics & Gynecology
320 MONTAUK HIGHWAY, SOUTH BAY OB GYN PC
WEST ISLIP, NY 11795
Suffolk County (631) 587-2500
KRISTIN LYNETTE SHARAR M.D.
Obstetrics & Gynecology
320 MONTAUK HIGHWAY, UNIVERSITY ASSOCIATES IN OBSTETRICS & GYNECOLOGY, UFPC
WEST ISLIP, NY 11795
Suffolk County (631) 587-2500
MS. DENISE E LESTER MD
Obstetrics & Gynecology
320 MONTAUK HIGHWAY, SOUTH BAY OBGYN PC
WEST ISLIP, NY 11795
Suffolk County (631) 587-2500
MS. MARIA E LOCKHART MD
Obstetrics & Gynecology
320 MONTAUK HIGHWAY, SOUTH BAY OBGYN PC
WEST ISLIP, NY 11795
Suffolk County (631) 587-2500
ANGELINE B SEAH
Obstetrics & Gynecology
320 MONTAUK HIGHWAY, SOUTH BAY OBGYN
WEST ISLIP, NY 11795
Suffolk County (631) 587-2500

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Maiorino's NPI number?

The NPI number for William Maiorino is 1740392174. It was assigned to this individual provider in the NPPES registry on August 31, 2006.

Where is William Maiorino located?

William Maiorino practices at 320 Montauk Highway South Bay Obgyn PC, West Islip, NY 11795. The listed phone number is (631) 587-2500.

What is William Maiorino's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecology, with taxonomy code 207VG0400X.

When was this NPI record last updated?

The NPPES record for William Maiorino was last updated on September 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.