Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Prof. Gary You-Gang Chen, M.D.

Orthopaedic Surgery Physician in Los Angeles, CA · enumerated 2006.

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

National Provider Identifier

1831123934

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Registry record

Entity type Individual (Type 1)

Name Prof. Gary You-Gang Chen

Credential M.D.

Sex Male

Practice address Los Angeles, CA, 90015

Phone (213) 765-8088

Fax (213) 765-8181

Enumeration date Jul 11, 2006

Last updated in NPPES Sep 11, 2017

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License A78259 (CA) Primary

207XS0106X Orthopaedic Hand Surgery Physician Allopathic & Osteopathic Physicians · License A78259 (CA) Secondary

207XS0114X Adult Reconstructive Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License A78259 (CA) Secondary

207XX0005X Sports Medicine (Orthopaedic Surgery) Physician Allopathic & Osteopathic Physicians · License A78259 (CA) Secondary

207XX0801X Orthopaedic Trauma Physician Allopathic & Osteopathic Physicians · License A78259 (CA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 do I verify Gary Chen's NPI record?

Cross-check NPI 1831123934 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1831123934 active?

Yes, as of the latest NPPES snapshot, NPI 1831123934 is active (record last updated 2017-09-11).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-09-11.