Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Joseph P Trezza & James M Tatum, Inc.

Optometrist in Rancho Cucamonga, CA · enumerated 2006 · authorized official Joseph Trezza, President.

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

National Provider Identifier

1598713794

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Registry record

Entity type Organization (Type 2)

Legal business name Joseph P Trezza & James M Tatum, Inc.

Other name <Unavail>

Practice address 10165 Foothill Blvd, #6, Rancho Cucamonga, CA, 91730

Phone (909) 987-0728

Fax (909) 987-0729

Enumeration date May 4, 2006

Last updated in NPPES Feb 27, 2014

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License CA6368T (CA) Primary

152W00000X Optometrist Eye and Vision Services Providers · License CA6372T (CA) Secondary

Authorized official

Name Joseph Trezza

Title President

Phone (909) 987-0728

Other identifiers

Identifier	Type	State	Issuer
SD0063720	Other	CA	MEDICAL
SD0063680	Other	CA	MEDICAL

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where is Joseph P Trezza & James M Tatum, Inc. located?

The practice location on file with NPPES is in Rancho Cucamonga, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2014-02-27. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-02-27.