Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Gilroy Medical Group, Inc

Family Medicine Physician in Gilroy, CA · enumerated 2019 · authorized official Donald Siao, President.

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

National Provider Identifier

1609430065

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Registry record

Entity type Organization (Type 2)

Legal business name Gilroy Medical Group, Inc

Practice address 8833 Monterey Rd Ste H, Gilroy, CA, 95020

Phone (408) 842-1544

Enumeration date Apr 30, 2019

Last updated in NPPES Apr 30, 2019

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Donald Siao

Title President

Phone (408) 206-0217

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2019-04-30. Verify at npiregistry.cms.hhs.gov.

Where is Gilroy Medical Group, Inc located?

The practice location on file with NPPES is in Gilroy, CA.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-04-30.