Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Moore Vanneman, M.D.

Gastroenterology Physician in Winchester, MA · enumerated 2006.

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

National Provider Identifier

1124075718

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Registry record

Entity type Individual (Type 1)

Name William Moore Vanneman

Credential M.D.

Sex Male

Practice address 955 Main St, Winchester, MA, 01890

Phone (781) 729-5855

Fax (781) 721-5891

Enumeration date May 28, 2006

Last updated in NPPES Nov 6, 2012

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 38046 (MA) 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
0160725	Medicaid	MA	-
C20230	Other	MA	BLUE CROSS & BLUE SHIELD
38046	Other	MA	TUFTS
24794	Other	MA	US HEALTHCARE
30034	Other	MA	HARVARD PILGRIM

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 Vanneman's NPI record?

Cross-check NPI 1124075718 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1124075718 active?

Yes, as of the latest NPPES snapshot, NPI 1124075718 is active (record last updated 2012-11-06).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-06.