Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

William S. Silver MD & Eric L. Tatar MD PC

Gastroenterology Physician in West Nyack, NY · enumerated 2006 · authorized official William Silver, President.

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

National Provider Identifier

1073523320

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Registry record

Entity type Organization (Type 2)

Legal business name William S. Silver MD & Eric L. Tatar MD PC

Other name <Unavail>

Practice address 2 Medical Park Dr, Suite 14, West Nyack, NY, 10994

Phone (845) 362-3300

Fax (845) 362-8001

Enumeration date Aug 9, 2006

Last updated in NPPES Mar 17, 2015

Taxonomy & classification

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 125290 (NY) Primary

Authorized official

Name William Silver

Title President

Phone (845) 362-3300

Other identifiers

Identifier	Type	State	Issuer
1073523320	Other	-	NPI

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

Where is William S. Silver MD & Eric L. Tatar MD PC located?

The practice location on file with NPPES is in West Nyack, NY.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2015-03-17. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-03-17.