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ELENA Y NGUYEN MD
NPI 1235592387
Ophthalmology in Foster City, CA

Active since April 05, 2016PECOS EnrolledAccepts Medicare Assignment
1241 E HILLSDALE BLVD STE 220, FOSTER CITY, CA 94404(650) 288-1633(650) 288-6933 Get Directions Write a Review

NPPES record last updated: January 9, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 9, 2023, Sep 20, 2022, Aug 12, 2021 (3 updates tracked since 2021).

About Elena Y Nguyen Md NPPES

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

ELENA Y NGUYEN MD (NPI 1235592387) is an individual ophthalmology provider in Foster City, California, licensed in California (A173649) and active in the NPI registry since April 2016. She is enrolled in Medicare PECOS and is a graduate of West Virginia University School Of Medicine (2016).

NPPES Registry Identity

NPI1235592387
Entity TypeIndividualFemale
Primary Taxonomy207W00000X
Provider Legal NameELENA Y NGUYENCredential: MD
Location Address1241 E HILLSDALE BLVD STE 220Foster City, CA 94404-1296
Mailing Address1241 E Hillsdale Blvd Ste 220Foster City, CA 94404-1296 · (650) 288-1633 · Fax (650) 288-6933
Phone(650) 288-1633
Fax(650) 288-6933
Sole ProprietorNo
Medical School CMSWest Virginia University School Of MedicineGraduated 2016
Enumeration DateApril 5, 2016
Last NPPES UpdateJanuary 9, 20233 updates tracked since enumeration
NPPES CertifiedJanuary 9, 2023
✔ NPI 1235592387 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in CA · A173649
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
1241 E HILLSDALE BLVD STE 220, Foster City, CA 94404
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Elena Y Nguyen Md 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 ID6002106234
PECOS Enrollment IDI20210820002260
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.

Medicare Billing Reassignment

Medicare enrollment records show Elena Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Santa Clara Ophthalmology Incorporated
25 mi
Ophthalmology
2081 FOREST AVE STE 2
San Jose, CA 95128
  • Reassigned Medicare billing, California enrollment
  • 3 clinicians in this Medicare group
NPI 1801106968 (408) 777-6350

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 10

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.

New patient complete exam of visual system 92004
A new patient complete exam of the visual system is a thorough evaluation of your eyes and vision. It checks for any potential issues and assesses overall eye health. It includes tests for visual acuity, eye movement, and light response.
57 services57 patients
Exam to measure eye deviation and range of motion 92060
This is an eye exam that checks for any misalignment in your eyes, also known as deviation. It also assesses the movement range of your eyes. The procedure is painless and helps in detecting conditions like strabismus or other vision issues.
47 services34 patients
Established patient complete exam of visual system 92014
An established patient complete exam of the visual system involves a thorough check of your eyes and vision. It assesses eye health, checks for diseases, and measures your ability to see clearly at different distances. It's a routine, non-invasive procedure.
45 services34 patients
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.
42 services36 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
42 services35 patients
Imaging of retina 92134
Imaging of the retina is a non-invasive procedure that captures detailed images of your eye's interior. This helps detect conditions like macular degeneration or retinal detachment. It's painless and takes only a few minutes.
31 services27 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94404 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.

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 Elena Nguyen's NPI number?

The NPI number for Elena Nguyen is 1235592387. It was assigned to this individual provider in the NPPES registry on April 5, 2016.

Where is Elena Nguyen located?

Elena Nguyen practices at 1241 E Hillsdale Blvd Ste 220, Foster City, CA 94404. The listed phone number is (650) 288-1633.

What is Elena Nguyen's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Elena Nguyen enrolled in Medicare?

Yes. Elena 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.

Which organization bills Medicare for Elena Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Elena Nguyen reassigns Medicare benefits to Santa Clara Ophthalmology Incorporated (San Jose, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Elena Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Elena Nguyen was last updated on January 9, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.