Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Dr. Grace Guimei Yao, A Professional Corporation

Obstetrics & Gynecology Physician in Irvine, CA · enumerated 2015 · authorized official Grace Yao, President.

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

National Provider Identifier

1588033773

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Registry record

Entity type Organization (Type 2)

Legal business name Dr. Grace Guimei Yao, A Professional Corporation

Practice address 60 Discovery, Irvine, CA, 92618

Phone (949) 418-7330

Fax (844) 269-8761

Enumeration date Sep 18, 2015

Last updated in NPPES Mar 27, 2026

Taxonomy & classification

174400000X Specialist Other Service Providers · License A132410 (CA) Secondary

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Grace Yao

Title President

Phone (323) 369-9962

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 2026-03-27. Verify at npiregistry.cms.hhs.gov.

Where is Dr. Grace Guimei Yao, A Professional Corporation located?

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

Providers at this address

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Maryellen O'Reilly General Practice Physician · Irvine, CA NPI 1780851808

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-27.