Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Stephen Warshafsky MD Internal Medicine Pllc

Internal Medicine Physician in Ardsley, NY · enumerated 2009 · authorized official Stephen Warshafsky, Principal.

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

National Provider Identifier

1780816918

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Registry record

Entity type Organization (Type 2)

Legal business name Stephen Warshafsky MD Internal Medicine Pllc

Practice address 1055 Saw Mill River Rd, Suite 206, Ardsley, NY, 10502

Phone (914) 591-0733

Fax (914) 591-2213

Enumeration date Aug 21, 2009

Last updated in NPPES Aug 21, 2009

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 60188090 (NY) Primary

Authorized official

Name Stephen Warshafsky

Title Principal

Phone (914) 260-4729

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 is the NPI number for Stephen Warshafsky MD Internal Medicine Pllc?

The NPI for Stephen Warshafsky MD Internal Medicine Pllc is 1780816918, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Stephen Warshafsky MD Internal Medicine Pllc?

NPPES lists Stephen Warshafsky (Principal) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-08-21.