Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Robert Sidney Schwartz M.D., Pllc

Gynecologic Oncology Physician in West Islip, NY · enumerated 2006 · authorized official Anna Schwartz, Office Manager.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1013925841

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Registry record

Entity type Organization (Type 2)

Legal business name Robert Sidney Schwartz M.D., Pllc

Practice address 500 Montauk Hwy, Suite W, West Islip, NY, 11795

Phone (631) 661-5511

Fax (631) 661-5516

Enumeration date Aug 4, 2006

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207VX0201X Gynecologic Oncology Physician Allopathic & Osteopathic Physicians · License 104203 (NY) Primary

Authorized official

Name Anna Schwartz

Title Office Manager

Phone (917) 952-0035

Other identifiers

Identifier	Type	State	Issuer
00391548	Medicaid	NY	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Robert Sidney Schwartz M.D., Pllc?

Robert Sidney Schwartz M.D., Pllc is registered in NPPES as a Gynecologic Oncology Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.