Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. William Leonard Krieger, DC

Chiropractor in Williamsville, NY · enumerated 2006.

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

National Provider Identifier

1861441339

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Registry record

Entity type Individual (Type 1)

Name Dr. William Leonard Krieger

Credential DC

Sex Male

Practice address Williamsville, NY, 14221

Phone (716) 633-6044

Fax (716) 332-2286

Enumeration date May 10, 2006

Last updated in NPPES Dec 21, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License X4093 (NY) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Other identifiers

Identifier	Type	State	Issuer
000200429002	Other	NY	BCBS
8890004	Other	NY	INDEPENDENT HEALTH
10034	Other	NY	PRISM

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

Where does William Krieger practice?

The practice location on file with NPPES is in Williamsville, NY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for William Krieger?

The National Provider Identifier (NPI) for William Krieger is 1861441339, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-12-21.