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SIDNEY ALEXANDRIA NGUYEN OD
NPI 1285500769
Optometrist in Livermore, CA

Active since October 13, 2025PECOS EnrolledAccepts Medicare Assignment
2580 OLD 1ST ST, LIVERMORE, CA 94550(925) 449-8188 Get Directions Write a Review

NPPES record last updated: October 13, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Sidney Alexandria Nguyen Od NPPES

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

SIDNEY ALEXANDRIA NGUYEN OD (NPI 1285500769) is an individual optometrist in Livermore, California, licensed in California (36135) and active in the NPI registry since October 2025. She is enrolled in Medicare PECOS and is a graduate of University Of California - School Of Optometry (2025).

NPPES Registry Identity

NPI1285500769
Entity TypeIndividualFemale
Primary Taxonomy152W00000X
Provider Legal NameSIDNEY ALEXANDRIA NGUYENCredential: OD
Location Address2580 OLD 1ST STLivermore, CA 94550-2055
Mailing Address29925 Sugar Maple CtHayward, CA 94544-6676 · (650) 888-9210
Phone(925) 449-8188
Sole ProprietorNo
Medical School CMSUniversity Of California - School Of OptometryGraduated 2025
Enumeration DateOctober 13, 2025
NPPES CertifiedOctober 13, 2025
✔ NPI 1285500769 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 · 36135
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.
2580 OLD 1ST ST, Livermore, CA 94550
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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 and accepts Medicare assignment

Sidney Alexandria Nguyen Od is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2062902893
PECOS Enrollment IDI20251109000197
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 94550 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.

DR. AARON LEE OD
Optometrist
2580 OLD 1ST ST
LIVERMORE, CA 94550
Alameda County (925) 449-8188
ACCUVISION EYECARE OPTOMETRY
Optometrist
2580 OLD 1ST ST
LIVERMORE, CA 94550
Alameda County (925) 449-8188
DR. VIYADA JOY MICHELSEN O.D.
Optometrist
2580 OLD 1ST ST
LIVERMORE, CA 94550
Alameda County (510) 847-7824
ANALYN SAN PEDRO DIZON O.D.
Optometrist
2580 OLD 1ST ST
LIVERMORE, CA 94550
Alameda County (925) 449-8188

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 Sidney Nguyen's NPI number?

The NPI number for Sidney Nguyen is 1285500769. It was assigned to this individual provider in the NPPES registry on October 13, 2025.

Where is Sidney Nguyen located?

Sidney Nguyen practices at 2580 Old 1st St, Livermore, CA 94550. The listed phone number is (925) 449-8188.

What is Sidney Nguyen's specialty?

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

Is Sidney Nguyen enrolled in Medicare?

Yes. Sidney Nguyen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Sidney Nguyen was last updated on October 13, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.