Alexander Nguyen, M.D.
NPI 1619316395 · Ophthalmology Physician · Waterbury, CT
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Nguyen, M.D. is a Ophthalmology Physician provider in Waterbury, CT (NPI 1619316395).
Provider details
- NPI number
- 1619316395
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,938 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) |
|---|---|---|
| Exam of Visual Field With Extended Testing92083 | 736 | $68 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 704 | $97 |
| Imaging of Optic Nerve92133 | 636 | $38 |
| Established Patient Complete Exam of Visual System92014 | 463 | $135 |
| Exam of the Internal Drainage System of Eye92020 | 414 | $29 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 352 | $136 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 2,758 | 643 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 1,021 | 276 |
| Brimonidine Tartrate | 782 | 203 |
| Timolol Maleate | 771 | 253 |
| Prednisolone Acetate | 518 | 333 |
| Dorzolamide Hcl | 351 | 105 |
| Netarsudil Mesylatebrand: Rhopressa | 327 | 71 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$160 across 2 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 (2)
- 111 Park StApartment 2nNew Haven, CT 06511-5412Phone: (561) 315-3914
- 900 Nw 17th StMiami, FL 33136-1119Phone: (305) 243-2020
Registry dates
- Enumerated
- 2013-06-17
- Last updated
- 2024-06-26
- Certified
- 2024-06-26
Frequently asked questions
- What is Alexander Nguyen's NPI number?
- Alexander Nguyen's National Provider Identifier (NPI) is 1619316395, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Nguyen's specialty?
- Alexander Nguyen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Nguyen located?
- Alexander Nguyen's practice location on file with NPPES is 1201 W Main St Ste 100, Waterbury, CT 06708-3105.
- What is Alexander Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Alexander Nguyen is (203) 597-9100.
- Does Alexander Nguyen accept Medicare?
- Alexander Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Nguyen's NPI active?
- Yes — Alexander Nguyen's NPI (1619316395) is active in the NPPES registry as of the last update on 2024-06-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.