Elizabeth Nguyen, D.O.
NPI 1689891640 · Ophthalmology Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elizabeth Nguyen, D.O. is a Ophthalmology Physician provider in Fountain Valley, CA (NPI 1689891640).
Provider details
- NPI number
- 1689891640
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 5101016090 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,678 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Complete Exam of Visual System92014 | 565 | $140 |
| Established Patient Problem Focused Exam of Visual System92012 | 532 | $99 |
| Exam of Visual Field With Extended Testing92083 | 283 | $71 |
| Imaging of Optic Nerve92133 | 241 | $38 |
| Photography of the Retina92250 | 223 | $39 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 146 | $179 |
| Removal of Eyelashes Using Forceps |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Erythromycin Basebrand: Erythromycin | 347 | 197 |
| Bimatoprostbrand: Lumigan | 328 | 80 |
| Latanoprost | 244 | 67 |
| Cyclosporinebrand: Restasis | 228 | 58 |
| Cyclosporine | 210 | 77 |
| Brinzolamide/Brimonidine Tartbrand: Simbrinza | 135 | 32 |
| Timolol Maleate | 113 | 32 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,146 across 38 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 210 Hospital CirSuite CWestminster, CA 92683-3900Phone: (714) 890-6000Fax: (714) 890-6004
Registry dates
- Enumerated
- 2007-04-19
- Last updated
- 2024-07-03
- Certified
- 2024-05-06
Frequently asked questions
- What is Elizabeth Nguyen's NPI number?
- Elizabeth Nguyen's National Provider Identifier (NPI) is 1689891640, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elizabeth Nguyen's specialty?
- Elizabeth Nguyen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Elizabeth Nguyen located?
- Elizabeth Nguyen's practice location on file with NPPES is 17010 Magnolia St Ste a, Fountain Valley, CA 92708-3215.
- What is Elizabeth Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Elizabeth Nguyen is (714) 839-2077.
- Does Elizabeth Nguyen accept Medicare?
- Elizabeth Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elizabeth Nguyen's NPI active?
- Yes — Elizabeth Nguyen's NPI (1689891640) is active in the NPPES registry as of the last update on 2024-07-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.