Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Regents of the University of California

Q: What is the NPI number for Regents of the University of California?

The NPI for Regents of the University of California is 1477649390, a Type 2 (organization) record in the CMS NPPES registry.

General Acute Care Hospital in Sacramento, CA · enumerated 2006 · authorized official Alan Siefkin, Medical Director.

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

National Provider Identifier

1477649390

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Registry record

Entity type Organization (Type 2)

Legal business name Regents of the University of California

Practice address 2315 Stockton Blvd, Sacramento, CA, 95817

Phone (916) 734-2011

Enumeration date Oct 5, 2006

Last updated in NPPES Jul 21, 2022

Taxonomy & classification

282N00000X General Acute Care Hospital Hospitals Primary

Authorized official

Name Alan Siefkin

Title Medical Director

Phone (916) 734-9331

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

What is the NPI number for Regents of the University of California?

The NPI for Regents of the University of California is 1477649390, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Regents of the University of California?

NPPES lists Alan Siefkin (Medical Director) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.