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Michael J Antonini, M.D.

Surgery Physician in Auburn, CA · enumerated 2007.

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

National Provider Identifier

1700924941

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Registry record

Entity type Individual (Type 1)
Name Michael J Antonini
Credential M.D.
Sex Male
Practice address 11795 Education St Ste 201, Auburn, CA, 95602
Phone (530) 745-0720
Fax (530) 745-0718
Enumeration date Feb 1, 2007
Last updated in NPPES Aug 21, 2024

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License G84850 (CA) 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
GR0091920 Medicaid CA -

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 Michael Antonini?
Michael Antonini is registered in NPPES with the primary taxonomy of Surgery 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 2024-08-21.