Physician Profile
Alexander THIEN AN NGOC Nguyen, M.D.
Unclaimed ProfileAbout Dr. Nguyen
Based in Waterbury, CT, Alexander THIEN AN NGOC Nguyen, M.D. is listed in the NPI registry under ophthalmology. Alexander graduated from Washington University School of Medicine in 2013. Alexander is also listed as specializing in student in an organized health care education program. Medicare claims data shows Alexander provided 3,938 services to 3,311 patients. The services billed most often include exam of visual field with extended testing, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and imaging of optic nerve.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (203) 597-9100
- Email not available
Practice Locations
1201 W MAIN ST STE 100
Waterbury, CT 06708
111 Park St Apartment 2N
New Haven, CT 06511
900 NW 17th St
Miami, FL 33136
Conditions Commonly Evaluated or Treated
Within Ophthalmology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Cataracts
- Diabetic retinopathy
- Dry eye
- Glaucoma
- Macular degeneration
Cornea and external eye
- Blepharitis
- Corneal abrasion
- Corneal ulcer
- Keratoconus
- Pink eye
- Pterygium
Eyelid and tear drainage
- Blocked tear duct
- Chalazion
- Drooping eyelid
Refractive and focusing
- Astigmatism
- Eye misalignment (strabismus)
- Farsightedness
- Lazy eye (amblyopia)
- Nearsightedness
- Presbyopia
Retina and vitreous
- Epiretinal membrane
- Retinal detachment
Eye injuries
- Foreign Object in Eye
Inflammation, neurologic, and orbit
- Thyroid eye disease
- Uveitis
Retina & vitreous
- Eye Floaters and Flashes
Procedures & services
Most searched procedures
- Cataract surgery
- Eye exam
- LASIK
- Retina surgery
Examination and imaging
- Corneal topography
- Fluorescein angiography
Cataract and lens
- Intraocular lens exchange
- YAG laser capsulotomy
Corneal procedures
- Amniotic Membrane Eye Graft
Eye diagnostics
- Optical Coherence Tomography Scan
Eye injuries
- Eye Scratch Laceration Repair
- Foreign Object Removal from Eye
Eyelid surgery
- Stye Removal
Eyelid, tear duct, and muscle
- Drooping-eyelid repair
- Entropion repair
- Eye-muscle surgery
- Eyelid surgery
- Tear-duct bypass surgery
Glaucoma
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
Laser eye surgery
- Laser Floater Removal
Laser procedures
- Laser Treatment for Retinal Tear
Laser vision correction
- SMILE Eye Surgery
Refractive surgery
- Clear Lens Exchange
- Implantable Contact Lenses
Tear duct & Orbit
- Orbital Decompression Surgery
- Tear Duct Plugs
Procedures Most Often Billed to Medicare
3,938 services · 3,311 patients · 19 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
59 | Less often than most peers in Ophthalmology |
| Laser repair to improve eye fluid flow | Procedure | 65855 |
53 | More often than most peers in Ophthalmology |
| Creation of eye fluid drainage tracts in iris using a laser, per session | Procedure | 66761 |
25 | As often as other peers in Ophthalmology |
| Removal of recurring cataract in lens capsule using a laser | Procedure | 66821 |
20 | Less often than most peers in Ophthalmology |
| Incision to improve eye fluid flow | Procedure | 65820 |
16 | Less often than most peers in Ophthalmology |
| Destruction of lens tissue using laser | Procedure | 66710 |
12 | Less often than most peers in Ophthalmology |
| Ultrasound scan of cornea to determine thickness | Imaging | 76514 |
57 | More often than most peers in Ophthalmology |
| Exam of visual field with extended testing | Treatment | 92083 |
736 | More than most peers in Ophthalmology |
| Imaging of optic nerve | Treatment | 92133 |
636 | More than most peers in Ophthalmology |
| Established patient complete exam of visual system | Treatment | 92014 |
463 | More often than most peers in Ophthalmology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other eye doctors at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 2
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 31 related providers in 4 groups
Other eye doctors in Waterbury 7
Same specialty, same city.
Trained at Washington University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Washington University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of cataract with insertion of prosthetic lens 8
Providers in CT who bill this service to Medicare most often.
Common questions
What kind of doctor is Alexander THIEN AN NGOC Nguyen?
Alexander THIEN AN NGOC Nguyen is an eye doctor in Waterbury, CT. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology”.
NPI registry
What is Alexander THIEN AN NGOC Nguyen's address?
Alexander THIEN AN NGOC Nguyen is listed at 1201 W Main St Ste 100, Waterbury, CT 06708. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Alexander THIEN AN NGOC Nguyen?
The number on file is (203) 597-9100. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Alexander THIEN AN NGOC Nguyen?
Alexander THIEN AN NGOC Nguyen's National Provider Identifier is 1619316395. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Alexander THIEN AN NGOC Nguyen train?
Alexander THIEN AN NGOC Nguyen attended Washington University School of Medicine, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Alexander THIEN AN NGOC Nguyen have?
Alexander THIEN AN NGOC Nguyen has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What procedures does Alexander THIEN AN NGOC Nguyen perform?
According to Medicare billing data, Alexander THIEN AN NGOC Nguyen performs procedures including removal of cataract with insertion of prosthetic lens, laser repair to improve eye fluid flow and creation of eye fluid drainage tracts in iris using a laser, per session; reads or performs imaging such as ultrasound scan of cornea to determine thickness; provides treatments such as exam of visual field with extended testing and imaging of optic nerve, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Alexander THIEN AN NGOC Nguyen's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Alexander THIEN AN NGOC Nguyen. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.