MARY NGUYEN O.D.
NPI 1285981274
Optometrist in Castro Valley, CA

Q: What is Mary Nguyen's NPI number?

The NPI number for Mary Nguyen is 1285981274. It was assigned to this individual provider in the NPPES registry on August 8, 2012.

Q: What is Mary Nguyen's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Q: When was this NPI record last updated?

The NPPES record for Mary Nguyen was last updated on January 28, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years 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.

Active since August 08, 2012PECOS Enrolled

3550 CASTRO VALLEY BLVD, CASTRO VALLEY, CA 94546(510) 581-1680 Get Directions Write a Review

NPPES record last updated: January 28, 2016. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Mary Nguyen O.d. NPPES

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

MARY NGUYEN O.D. (NPI 1285981274) is an individual optometrist in Castro Valley, California, licensed in California (OPT 14496) and active in the NPI registry since August 2012. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1285981274

Entity TypeIndividualFemale

Primary Taxonomy152W00000X

Provider Legal NameMARY NGUYENCredential: O.D.

Location Address3550 CASTRO VALLEY BLVDCastro Valley, CA 94546-4402

Mailing Address3550 Castro Valley BlvdCastro Valley, CA 94546-4402 · (510) 581-1680

Phone(510) 581-1680

Sole ProprietorNo

Enumeration DateAugust 8, 2012

Last NPPES UpdateJanuary 28, 2016

✔ NPI 1285981274 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers

Taxonomy Code152W00000X

License✔ Licensed in CA · OPT 14496

Definition

Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.

3550 CASTRO VALLEY BLVD, Castro Valley, CA 94546

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Other Identifiers 1

Medicare PINHD969ZCA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mary Nguyen O.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 94546 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

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

Established Patient

$84.91 typical visit price

range $23.44 – $166.46

Typical copayment $21.22 (range $5.86 – $41.61)

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 4

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

JOHN SIC-YIU LIU

Optometrist

3550 CASTRO VALLEY BLVD
CASTRO VALLEY, CA 94546

Alameda County (510) 581-1680

EYEBRIGHT OPTOMETRY

Optometrist

3550 CASTRO VALLEY BLVD
CASTRO VALLEY, CA 94546

Alameda County (510) 581-1680

KAIYUN KATHLEEN MAI O.D.

Optometrist

3550 CASTRO VALLEY BLVD
CASTRO VALLEY, CA 94546

Alameda County (510) 581-1680

KATHLEEN MAI, O.D., OPTOMETRY CORP

Optometrist

3550 CASTRO VALLEY BLVD
CASTRO VALLEY, CA 94546

Alameda County (510) 581-1680

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 Mary Nguyen's NPI number?

The NPI number for Mary Nguyen is 1285981274. It was assigned to this individual provider in the NPPES registry on August 8, 2012.

Where is Mary Nguyen located?

Mary Nguyen practices at 3550 Castro Valley Blvd, Castro Valley, CA 94546. The listed phone number is (510) 581-1680.

What is Mary Nguyen's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Is Mary Nguyen enrolled in Medicare?

Yes. Mary Nguyen is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mary Nguyen was last updated on January 28, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years 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.