Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Bonzelet, MD

Internal Medicine Physician in Edwardsville, IL · enumerated 2006.

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

National Provider Identifier

1548224686

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Registry record

Entity type Individual (Type 1)

Name Dr. William Bonzelet

Credential MD

Sex Male

Practice address Seven 157 Center, Edwardsville, IL, 62025

Phone (618) 659-2371

Fax (618) 659-2375

Enumeration date Apr 14, 2006

Last updated in NPPES May 28, 2020

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036091754 (IL) 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
112688	Other	MO	BCBS MO
B51654	Other	-	MERCY
68241	Other	-	PRUCARE
036091754	Medicaid	IL	-
0409003	Other	-	MEDICARE COMPLETE
112688	Other	-	BLUECHOICE
277675	Other	-	HEALTHLINK
0401769	Other	-	UNITED HEALTHCARE
06022637	Other	IL	BCBS IL
112688	Other	-	ALLIANCE
33167	Other	-	HEALTHPARTNERS GHP
33031	Other	-	ADVANTRA
33031	Other	-	GHP
4652964	Other	-	AETNA
371385704	Other	-	CIGNA
6022637	Other	-	BLUECARD

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 specialty is William Bonzelet?

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

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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-05-28.