Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

U.S. Healthworks Medical Group of Illinois, PC

Preventive Medicine/Occupational Environmental Medicine Physician in Valencia, CA · enumerated 2012 · authorized official Joseph Mallas, Chief Operating Officer.

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

National Provider Identifier

1467797316

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Registry record

Entity type Organization (Type 2)

Legal business name U.S. Healthworks Medical Group of Illinois, PC

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

Phone (661) 678-2600

Fax (661) 678-2700

Enumeration date Dec 4, 2012

Last updated in NPPES Dec 4, 2012

Taxonomy & classification

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

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

Authorized official

Name Joseph Mallas

Title Chief Operating Officer

Phone (661) 678-2600

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

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.

What type of organization is U.S. Healthworks Medical Group of Illinois, PC?

U.S. Healthworks Medical Group of Illinois, PC is registered in NPPES as a Preventive Medicine/Occupational Environmental Medicine Physician (its primary provider taxonomy).

Providers at this address

Browse all →

U.S. Healthworks Medical Group of Arizona, Inc. Urgent Care Clinic/Center · Valencia, CA NPI 1023098845 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 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 2012-12-04.