NPI Portal NPI Lookup & Verification

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

Dr. Greg Shih-Han Yen, M.D.

Cardiovascular Disease Physician in San Gabriel, CA · enumerated 2006.

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

National Provider Identifier

1093739021

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Greg Shih-Han Yen
Credential M.D.
Sex Male
Practice address San Gabriel, CA, 91776
Phone (626) 576-8500
Fax (626) 576-8050
Enumeration date Jul 26, 2006
Last updated in NPPES Feb 3, 2024

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

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License A061210 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
00A612100 Medicaid CA -

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

Where does Greg Yen practice?
The practice location on file with NPPES is in San Gabriel, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Greg Yen?
The National Provider Identifier (NPI) for Greg Yen is 1093739021, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-03.