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DR. DIEN NGUYEN O.D.
NPI 1770636557
Optometrist in Fremont, CA

Active since January 18, 2007PECOS EnrolledAccepts Medicare Assignment
39400 PASEO PADRE PKWY, FREMONT, CA 94538(510) 248-3367 Get Directions Write a Review

NPPES record last updated: December 30, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Dien Nguyen O.d. NPPES

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

DR. DIEN NGUYEN O.D. (NPI 1770636557) is an individual optometrist in Fremont, California, licensed in California (11458T) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of Other (2000).

NPPES Registry Identity

NPI1770636557
Entity TypeIndividualMale
Primary Taxonomy152W00000X
Provider Legal NameDR. DIEN NGUYENCredential: O.D.
Location Address39400 PASEO PADRE PKWYFremont, CA 94538-2310
Mailing Address4731 Silvertide CtUnion City, CA 94587-6012 · (510) 487-8819
Phone(510) 248-3367
Sole ProprietorNo
Medical School CMSOtherGraduated 2000
Enumeration DateJanuary 18, 2007
Last NPPES UpdateDecember 30, 2021
✔ NPI 1770636557 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 · 11458T
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.
39400 PASEO PADRE PKWY, Fremont, CA 94538
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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

Dr. Dien Nguyen O.d. 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 ID6608026604
PECOS Enrollment IDI20121029000644
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.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Photography of the retina 92250
Photography of the retina, also known as retinal imaging, is a non-invasive procedure that captures images of the back of your eye. This helps doctors identify and monitor conditions like glaucoma, macular degeneration, or diabetic retinopathy. It's painless and quick, often part of a routine eye exam.
15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94538 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 20

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

MELINDA JENNY STEELE MD
Family Medicine
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 248-3000
HEUMIN LI R.PH.
Pharmacist
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 248-7577
SRILATA RAMAN M.D.
Internal Medicine
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 248-3623
MS. BARBARA TEDESCO ZEPEDA WHCNP
Registered Nurse (Women's Health Care, Ambulatory)
39400 PASEO PADRE PKWY, EMBARCADERO OB/GYN
FREMONT, CA 94538
Alameda County (510) 248-3591
CALVIN B. WHEELER MD
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 795-3000
HANNELORE MOHR MD
Internal Medicine
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 795-3000
FREDERICK G. HOM MD
Internal Medicine
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 795-3000
MANJU JACOB
Dietitian, Registered
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 739-6412

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 Dien Nguyen's NPI number?

The NPI number for Dien Nguyen is 1770636557. It was assigned to this individual provider in the NPPES registry on January 18, 2007.

Where is Dien Nguyen located?

Dien Nguyen practices at 39400 Paseo Padre Pkwy, Fremont, CA 94538. The listed phone number is (510) 248-3367.

What is Dien Nguyen's specialty?

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

Is Dien Nguyen enrolled in Medicare?

Yes. Dien 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 Dien Nguyen was last updated on December 30, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.