Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William R Siegart, DO

Emergency Medicine Physician in Exeter, NH · enumerated 2006.

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

National Provider Identifier

1174698419

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Registry record

Entity type Individual (Type 1)

Name William R Siegart

Credential DO

Sex Male

Practice address 5 Alumni Dr, Exeter, NH, 03833

Phone (603) 580-6793

Fax (603) 580-7006

Enumeration date Nov 21, 2006

Last updated in NPPES May 4, 2008

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 9436 (NH) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
000000042890	Other	-	BMC HEALTHNET PLAN
0162108	Medicaid	MA	-
930114660	Other	-	RAILROAD MEDICARE
AA17419	Other	-	HARVARD PILGRIM
30221919	Medicaid	NH	-
0401088Y0NH01	Other	NH	ANTHEM
299790099	Medicaid	NH	-

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is William Siegart?

William Siegart is registered in NPPES with the primary taxonomy of Emergency Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-04.