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Mr. William Joseph Alfieri, DC

Chiropractor in Portage, MI · enumerated 2005 · practices at William J Alfieri D.C., P.C..

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

National Provider Identifier

1437143203

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Registry record

Entity type Individual (Type 1)
Name Mr. William Joseph Alfieri
Credential DC
Sex Male
Practice address 925 W Milham Ave, Portage, MI, 49024
Phone (269) 327-8990
Fax (269) 327-6214
Enumeration date Sep 7, 2005
Last updated in NPPES Mar 14, 2008

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License WM004080 (MI) 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
C95034001 Other MI MEDICARE PART B
4430054 Other - UNITED HEALTHCARE
C95034001 Other - MEDICARE ID TYPE UNSPECIF
138342 Other - CARE CHOICES
138342 Other - PREFERRED CHOICES
764733 Other - FIRST HEALTH

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 Alfieri?
William Alfieri is registered in NPPES with the primary taxonomy of Chiropractor. 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 2008-03-14.