Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

East-West Rheumatology, Pllc

Rheumatology Physician in Vienna, VA · enumerated 2019 · authorized official Yousef Zarbalian, Founder.

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

National Provider Identifier

1043854938

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Registry record

Entity type Organization (Type 2)

Legal business name East-West Rheumatology, Pllc

Practice address 226 Maple Ave W Ste 202, Vienna, VA, 22180

Phone (225) 229-0325

Fax (703) 372-2646

Enumeration date Nov 4, 2019

Last updated in NPPES Aug 22, 2022

Taxonomy & classification

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Yousef Zarbalian

Title Founder

Phone (703) 372-2646

Other identifiers

Identifier	Type	State	Issuer
D0076539	Other	MD	STATE MEDICAL LICENSE NUMBER
0101260444	Other	VA	STATE MEDICAL LICENSE NUMBER

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

Where is East-West Rheumatology, Pllc located?

The practice location on file with NPPES is in Vienna, VA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2022-08-22. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Yousef Zarbalian Rheumatology Physician · Vienna, VA NPI 1396063319 Daun Jeong Acupuncturist · Vienna, VA NPI 1538709423

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-22.