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ELLEN B NGUYEN DDS
NPI 1134462971
Dentist in Hayward, CA

Active since March 29, 2013PECOS Enrolled
22331 MISSION BLVD, HAYWARD, CA 94541(510) 471-5880 Get Directions Write a Review

NPPES record last updated: April 23, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 23, 2026, Nov 12, 2024 (2 updates tracked since 2024).

About Ellen B Nguyen Dds NPPES

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

ELLEN B NGUYEN DDS (NPI 1134462971) is an individual dentist in Hayward, California, licensed in California (DDS63935) and active in the NPI registry since March 2013. She is enrolled in Medicare PECOS and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1134462971
Entity TypeIndividualFemale
Primary Taxonomy122300000X
Provider Legal NameELLEN B NGUYENCredential: DDS
Location Address22331 MISSION BLVDHayward, CA 94541-3911
Mailing Address22331 Mission BlvdHayward, CA 94541-3911 · (510) 471-5880
Phone(510) 471-5880
Sole ProprietorNo
Enumeration DateMarch 29, 2013
Last NPPES UpdateApril 23, 20262 updates tracked since enumeration
NPPES CertifiedApril 23, 2026
✔ NPI 1134462971 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentistDental Providers
Taxonomy Code122300000X
License✔ Licensed in CA · DDS63935
Definition
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.
22331 MISSION BLVD, Hayward, CA 94541
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Secondary Practice Locations 4

Location 133255 9th StUnion City, CA 94587-2137 · Phone (510) 471-5880
Location 228300 Huntwood AveHayward, CA 94544-5425 · Phone (510) 471-5880
Location 316110 E 14th StAshland, CA 94578-3002 · Phone (510) 471-5880
Location 4680 W Tennyson Rd Rm 12Hayward, CA 94544-5236 · Phone (510) 471-5880

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ellen B Nguyen Dds 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 94541 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
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.

DR. EUNICE DIZON DDS
Dentist (General Practice)
22331 MISSION BLVD
HAYWARD, CA 94541
Alameda County (510) 471-5880
DR. MELISSA ROSE MD
Pediatrics
22331 MISSION BLVD
HAYWARD, CA 94541
Alameda County (510) 471-5880
TIBURCIO VASQUEZ HEALTH CENTER, INC.
Clinic/Center (Federally Qualified Health Center (FQHC))
22331 MISSION BLVD
HAYWARD, CA 94541
Alameda County (510) 471-5880
JASMINE SANCHEZ RIVAS
Dentist
22331 MISSION BLVD
HAYWARD, CA 94541
Alameda County (510) 471-5880
NATALIE RAMIREZ CNM
Advanced Practice Midwife
22331 MISSION BLVD
HAYWARD, CA 94541
Alameda County (510) 471-5880
GABRIELA MARIA CHICA
Nurse Practitioner (Pediatrics)
22331 MISSION BLVD
HAYWARD, CA 94541
Alameda County (510) 471-5907
JESSICA PRICE FNP-C
Nurse Practitioner
22331 MISSION BLVD
HAYWARD, CA 94541
Alameda County (510) 471-5880
JACQUELINE JOYA B.S
Counselor
22331 MISSION BLVD
HAYWARD, CA 94541
Alameda County (510) 471-5880

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 Ellen Nguyen's NPI number?

The NPI number for Ellen Nguyen is 1134462971. It was assigned to this individual provider in the NPPES registry on March 29, 2013.

Where is Ellen Nguyen located?

Ellen Nguyen practices at 22331 Mission Blvd, Hayward, CA 94541. The listed phone number is (510) 471-5880.

What is Ellen Nguyen's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

Is Ellen Nguyen enrolled in Medicare?

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

When was this NPI record last updated?

The NPPES record for Ellen Nguyen was last updated on April 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.