Tri Nguyen, M.D.
NPI 1669436002 · Ophthalmology Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tri Nguyen, M.D. is a Ophthalmology Physician provider in Fountain Valley, CA (NPI 1669436002).
Provider details
- NPI number
- 1669436002
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- A78829 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,647 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 Problem Focused Exam of Visual System92012 | 867 | $105 |
| Extended Exam of the Back Part of the Eye With Optic Nerve Drawing92202 | 748 | $18 |
| Exam of the Internal Drainage System of Eye92020 | 508 | $32 |
| Imaging of Retina92134 | 486 | $47 |
| Established Patient Complete Exam of Visual System92014 | 459 | $148 |
| Photography of the Retina92250 | 406 | $43 |
| Exam of Visual Field With Extended Testing |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cyclosporinebrand: Restasis | 1,021 | 203 |
| Cyclosporine | 780 | 170 |
| Cyclosporinebrand: Cequa | 564 | 99 |
| Brimonidine Tartrate/Timololbrand: Combigan | 204 | 41 |
| Prednisolone Acetate | 176 | 67 |
| Latanoprostene Bunodbrand: Vyzulta | 125 | 30 |
| Brinzolamide/Brimonidine Tartbrand: Simbrinza | 116 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$597 across 33 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
Registry dates
- Enumerated
- 2006-04-13
- Last updated
- 2007-07-08
Frequently asked questions
- What is Tri Nguyen's NPI number?
- Tri Nguyen's National Provider Identifier (NPI) is 1669436002, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tri Nguyen's specialty?
- Tri Nguyen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Tri Nguyen located?
- Tri Nguyen's practice location on file with NPPES is 11100 Warner Ave, Fountain Valley, CA 92708-7506.
- What is Tri Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Tri Nguyen is (714) 435-1500.
- Does Tri Nguyen accept Medicare?
- Tri Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tri Nguyen's NPI active?
- Yes — Tri Nguyen's NPI (1669436002) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.