Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Regents of the University of Ca

Hematology (Internal Medicine) Physician in Sacramento, CA · enumerated 2005 · authorized official Tammy Trovatten, Vice President, Gov'T Reimbursement.

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

National Provider Identifier

1629061643

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Registry record

Entity type Organization (Type 2)

Legal business name Regents of the University of Ca

Other name <Unavail>

Practice address 4501 X St, Sacramento, CA, 95817

Phone (916) 724-5803

Fax (916) 734-7946

Enumeration date Aug 24, 2005

Last updated in NPPES May 16, 2025

Taxonomy & classification

207RH0000X Hematology (Internal Medicine) Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Tammy Trovatten

Title Vice President, Gov'T Reimbursement

Phone (916) 855-2315

Other identifiers

Identifier	Type	State	Issuer
CR0028	Other	CA	RAILROAD MEDICARE PIN
CI4127	Other	CA	RAILROAD MEDICARE PIN
DA4168	Other	CA	RAILROAD MEDICARE PIN
GR0021049	Medicaid	CA	-
CN4844	Other	CA	RAILROAD MEDICARE PIN
GNP000070	Medicaid	CA	-
DE7275	Other	CA	RAILROAD MEDICARE PIN
CN4400	Other	CA	RAILROAD MEDICARE PIN

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 type of organization is Regents of the University of Ca?

Regents of the University of Ca is registered in NPPES as a Hematology (Internal Medicine) Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-16.