Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

U.S. Healthworks Medical Group of Washington, Ps

Urgent Care Clinic/Center in Seattle, WA · enumerated 2016 · authorized official Joseph Mallas, Enrollment Specialist.

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

National Provider Identifier

1366991531

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Registry record

Entity type Organization (Type 2)

Legal business name U.S. Healthworks Medical Group of Washington, Ps

Parent organization U.S. Healthworks Medical Group of Washington, Ps

Practice address 836 Ne Northgate Way, Seattle, WA, 98125

Phone (206) 784-0737

Fax (206) 784-0369

Enumeration date Sep 28, 2016

Last updated in NPPES Sep 28, 2016

Taxonomy & classification

2083X0100X Occupational Medicine Physician Allopathic & Osteopathic Physicians Secondary

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

Authorized official

Name Joseph Mallas

Title Enrollment Specialist

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

Who is the authorized official for U.S. Healthworks Medical Group of Washington, Ps?

NPPES lists Joseph Mallas (Enrollment Specialist) as the authorized official for this organization.

What is the NPI number for U.S. Healthworks Medical Group of Washington, Ps?

The NPI for U.S. Healthworks Medical Group of Washington, Ps is 1366991531, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

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Eduardo Miller Family Medicine Physician · Seattle, WA NPI 1659355097 Amber Isenberg Massage Therapist · Seattle, WA NPI 1093017469 Thelma Maronge-Gregg Physical Therapist · Seattle, WA NPI 1275813487 Occupational Health Centers of Washington, P.S. Occupational Medicine Clinic/Center · Seattle, WA NPI 1295218006 American Current Care of Washington, P.S. Urgent Care Clinic/Center · Seattle, WA NPI 1619450418 Balaji Sridhar Occupational Medicine Physician · Seattle, WA NPI 1255890216

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-28.