Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William J Cohn, MD

Gastroenterology Physician in East Setauket, NY · enumerated 2006.

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

National Provider Identifier

1861459208

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Registry record

Entity type Individual (Type 1)

Name Dr. William J Cohn

Credential MD

Sex Male

Practice address 3400 Nesconset Hwy, Suite 101, East Setauket, NY, 11733

Phone (631) 751-8700

Fax (631) 751-5971

Enumeration date Apr 28, 2006

Last updated in NPPES Sep 20, 2012

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 126917 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00397402	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.

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Frequently asked questions

How do I verify William Cohn's NPI record?

Cross-check NPI 1861459208 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1861459208 active?

Yes, as of the latest NPPES snapshot, NPI 1861459208 is active (record last updated 2012-09-20).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-20.