Ellen Nguyen, DDS
NPI 1134462971 · Dentist · Hayward, CA
Enrolled with Medicare as Order and Referring Only - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ellen Nguyen, DDS is a Dentist provider in Hayward, CA (NPI 1134462971).
Provider details
- NPI number
- 1134462971
- Entity type
- Individual
- Primary specialty
- DentistDental Providers
- Credential
- DDS
- Sex
- Female
- Sole proprietor
- No
- License
- DDS63935 (CA)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
5 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (4)
- 16110 E 14th StAshland, CA 94578-3002Phone: (510) 471-5880
- 680 W Tennyson Rd Rm 12Hayward, CA 94544-5236Phone: (510) 471-5880
- 28300 Huntwood AveHayward, CA 94544-5425Phone: (510) 471-5880
- 33255 9th StUnion City, CA 94587-2137Phone: (510) 471-5880
Registry dates
- Enumerated
- 2013-03-29
- Last updated
- 2026-04-23
- Certified
- 2026-04-23
Frequently asked questions
- What is Ellen Nguyen's NPI number?
- Ellen Nguyen's National Provider Identifier (NPI) is 1134462971, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Nguyen's specialty?
- Ellen Nguyen is listed in the NPPES registry with a primary specialty of Dentist (Dental Providers).
- Where is Ellen Nguyen located?
- Ellen Nguyen's practice location on file with NPPES is 22331 Mission Blvd, Hayward, CA 94541-3911.
- What is Ellen Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Ellen Nguyen is (510) 471-5880.
- Does Ellen Nguyen accept Medicare?
- Ellen Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ellen Nguyen's NPI active?
- Yes — Ellen Nguyen's NPI (1134462971) is active in the NPPES registry as of the last update on 2026-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.