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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. GRACE GUIMEI YAO M.D.,PH.D
NPI 1184988461
Obstetrics & Gynecology in Irvine, CA

Active since July 01, 2012PECOS Enrolled
60 DISCOVERY, IRVINE, CA 92618(626) 233-9431(844) 269-8761 Get Directions Write a Review

NPPES record last updated: September 16, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Sep 16, 2026, Jul 29, 2022, Apr 15, 2021 (3 updates tracked since 2021).

About Dr. Grace Guimei Yao M.d.,ph.d NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GRACE GUIMEI YAO M.D.,PH.D (NPI 1184988461) is an individual obstetrics & gynecology provider in Irvine, California, licensed in California (A132410) and active in the NPI registry since July 2012. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1184988461
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. GRACE GUIMEI YAOCredential: M.D.,PH.D
Location Address60 DISCOVERYIrvine, CA 92618-3105
Mailing Address60 DiscoveryIrvine, CA 92618-3105 · (949) 418-7330 · Fax (844) 269-8761
Phone(626) 233-9431
Fax(844) 269-8761
Sole ProprietorYes
Enumeration DateJuly 1, 2012
Last NPPES UpdateSeptember 16, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 16, 2026
✔ NPI 1184988461 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · A132410
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
60 DISCOVERY, Irvine, CA 92618
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Grace Guimei Yao M.d.,ph.d is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92618 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. GRACE GUIMEI YAO, A PROFESSIONAL CORPORATION
Obstetrics & Gynecology
60 DISCOVERY
IRVINE, CA 92618
Orange County (949) 418-7330
DR. MARYELLEN O'REILLY M.D.
General Practice
60 DISCOVERY
IRVINE, CA 92618
Orange County (949) 586-9904

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Grace Yao's NPI number?

The NPI number for Grace Yao is 1184988461. It was assigned to this individual provider in the NPPES registry on July 1, 2012.

Where is Grace Yao located?

Grace Yao practices at 60 Discovery, Irvine, CA 92618. The listed phone number is (626) 233-9431.

What is Grace Yao's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Grace Yao enrolled in Medicare?

Yes. Grace Yao is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Grace Yao was last updated on September 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.