Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

U.S. Healthworks Medical Group of Arizona, Inc.

Urgent Care Clinic/Center in Valencia, CA · enumerated 2006 · authorized official Joseph Mallas, President.

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

National Provider Identifier

1023098845

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Registry record

Entity type Organization (Type 2)

Legal business name U.S. Healthworks Medical Group of Arizona, Inc.

Practice address 25124 Springfield Ct, Suite 200, Valencia, CA, 91355

Phone (661) 678-2300

Fax (661) 678-2700

Enumeration date Jan 18, 2006

Last updated in NPPES Apr 12, 2016

Taxonomy & classification

2083P0500X Preventive Medicine/Occupational Environmental Medicine Physician Allopathic & Osteopathic Physicians Secondary

261QU0200X Urgent Care Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Joseph Mallas

Title President

Phone (661) 678-2626

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2016-04-12. Verify at npiregistry.cms.hhs.gov.

Where is U.S. Healthworks Medical Group of Arizona, Inc. located?

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

Providers at this address

Browse all →

U.S. Healthworks Medical Group of Alaska, LLC Preventive Medicine/Occupational Environmental Medicine Physician · Valencia, CA NPI 1841270337 Beverly Lassiter-Brown Medical Physician Assistant · Valencia, CA NPI 1962670141 Tustin Irvine Medical Group, PC Urgent Care Clinic/Center · Valencia, CA NPI 1053576876 U.S. Healthworks Medical Group of Illinois, PC Preventive Medicine/Occupational Environmental Medicine Physician · Valencia, CA NPI 1467797316 U.S. Healthworks Medical Group of Kansas City, P.A Preventive Medicine/Occupational Environmental Medicine Physician · Valencia, CA NPI 1093152241 U.S. Healthworks Medical Group of Kentucky, Inc. Urgent Care Clinic/Center · Valencia, CA NPI 1619361961 U.S. Healthworks Provider Network of Colorado, Inc. Preventive Medicine/Occupational Environmental Medicine Physician · Valencia, CA NPI 1073970174

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-12.