Alexander Thien An Ngoc Nguyen, M.D.
Ophthalmology Physician · Waterbury, CT
Alexander Thien An Ngoc Nguyen, M.D. is an ophthalmology physician with a practice address in Waterbury, Connecticut, and NPI 1619316395, issued on Jun 17, 2013. Check the license (Connecticut 60860, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Alexander Thien An Ngoc Nguyen
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- 60860 CT
ME131460 FL
Self-reported in NPPES; status is on the state search - Practice location
- 1201 W Main St Ste 100, Waterbury, CT 06708
- Phone
- (203) 597-9100
- Enumerated
- Jun 17, 2013
- Record last updated
- Jun 26, 2024
- Fax
- (203) 401-6361
- Medicare enrollment
- Enrolled (PECOS I20180607002499); accepts Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 336 in Connecticut → Look up another NPI →
Also registered at 1201 W Main St Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Airi Ando, ODOptometrist1316517048
- Angela Bosjolie, DOOphthalmology Physician1093891608
- Jillian Kaplita, MDOphthalmology Physician1386148070
- Meredith Kim, M.D.Ophthalmology Physician1700311248
- Steven Thornquist, M.D.Pediatric Ophthalmology and Strabismus Specialist Physician1558441378
Verify Alexander Thien An Ngoc Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 60860Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.6 times the Medicare Part D claims of the average ophthalmology physician in 2024
8,435 Medicare Part D claims for 1,201 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Latanoprost2,758 claims
- Dorzolamide-Timolol1,021 claims
- Brimonidine Tartrate782 claims
- Timolol Maleate771 claims
- Prednisolone Acetate518 claims
- Dorzolamide Hcl351 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 89.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $159.82
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- The Eye Care Group, P.C.Waterbury, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexander Thien An Ngoc Nguyen among 336 ophthalmology physician records in Connecticut
Alexander Thien An Ngoc Nguyen, M.D. is one of 336 ophthalmology physician records with a practice address in Connecticut. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 85% of them.
- NPI issued2013 · 85% of these records are older, 14% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2013 · median 2000 among the 212 with a school on file
- Record last updated2024 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Connecticut
There are 336 ophthalmology physician records in Connecticut.
All 336 in Connecticut → Every provider in Waterbury → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Angela Bosjolie, DOWaterbury, CT 067081093891608
- Cinthia Covey, M.D.Waterbury, CT 067081174714117
- Vincent Deluise, M.D.Waterbury, CT 067081326000753
- Richard Getnick, M.D.Waterbury, CT 067081548222987
- Richard Gilbert, M.D.Waterbury, CT 067081770545659
- Glen Goodman, MDWaterbury, CT 067081043218159
- Edward Jaccoma, M.D.Waterbury, CT 067081982681367
- Olga Konykhov, M.D.Waterbury, CT 067081245375880
Common questions
What is Alexander Thien An Ngoc Nguyen, M.D.'s NPI number?
Alexander Thien An Ngoc Nguyen, M.D.'s National Provider Identifier (NPI) is 1619316395, issued on Jun 17, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Alexander Thien An Ngoc Nguyen, M.D. located?
The NPPES record lists a practice address at 1201 W Main St Ste 100, Waterbury, CT, 06708. Phone: (203) 597-9100. Providers update this record themselves, so call before visiting.
How can I verify Alexander Thien An Ngoc Nguyen, M.D.'s license?
NPPES lists Connecticut license number 60860, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alexander Thien An Ngoc Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Alexander Thien An Ngoc Nguyen, M.D. had 8,435 Medicare Part D claims for 1,201 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Alexander Thien An Ngoc Nguyen, M.D.'s MIPS final score?
The 2023 MIPS final score is 89.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.