Provider Profile
Dien Nguyen, O.D.
Unclaimed ProfileAbout Dr. Nguyen
Listed in the NPI registry as an optometrist, Dien Nguyen, O.D. practices in Fremont, CA. According to Medicare claims data, the services billed most often include photography of the retina.
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
- (510) 248-3367
- Email not available
Practice Locations
39400 PASEO PADRE PKWY
Fremont, CA 94538
Conditions Commonly Evaluated or Treated
Within Optometry 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
- Astigmatism
- Dry eye
- Nearsightedness
- Pink eye
- Presbyopia
Contact lens issues
Cornea conditions
- Keratoconus
- Pterygium
Corneal issues
Eye conditions
Eye discomfort
Eye diseases
- Cataracts
- Diabetic retinopathy
- Glaucoma
- Macular degeneration
- Retinal Tear Symptoms
Eye infections
- Corneal ulcer
Eye inflammation
Eye injuries
- Corneal abrasion
- Foreign Object in Eye
Eye irritation
Eye surface issues
Eyelid conditions
- Blepharitis
- Drooping eyelid
- Eye Twitching
- Stye
Eyelid issues
- Chalazion
- Ectropion
- Entropion
- Eyelash Lice or Dandruff
Pediatric eye conditions
- Eye misalignment (strabismus)
- Lazy eye (amblyopia)
Pupil issues
Tear duct issues
- Blocked tear duct
Vision changes
- Blurry Vision
- Color Blindness
- Distorted Vision
- Double Vision
- Eye Floaters and Flashes
- Eye Strain
- Farsightedness
- Halos Around Lights
- Light Sensitivity
- Night Blindness
- Posterior vitreous detachment
- Tunnel Vision
- Visual Migraines
Procedures & services
Most searched procedures
Contact lens exams
- Bifocal or Multifocal Contact Lens Fitting
- Contact Lens Training
- Plano (Non-Prescription) Colored Contact Lens Exam
- Toric Contact Lens Fitting
Dry eye treatments
Examinations
- Comprehensive medical eye examination
- Diabetic Eye Exam
- DMV Vision Test
- Low Vision Assessment
- Pediatric Eye Exam
Eyelid care
Eyelid treatments
- Stye Removal
General exams
Glasses and eyewear
- Blue Light Glasses Consultation
- Eyeglass Frame Adjustment and Repair
- Prescription Sunglasses Consultation
- Prism Eyeglasses Fitting
Imaging & tests
- Color Vision Testing
- Corneal topography
- Coronary optical coherence tomography
- Eye-pressure measurement
- Pachymetry
- Retinal photography
- Visual Field Test
Imaging and scans
- Optical Coherence Tomography Scan
Minor procedures
- Amniotic Membrane Placement
- Tear Duct Plugs
Specialty lenses
Surgical evaluations
Tear duct procedures
Therapy
Urgent care
- Emergency Eye Care
- Foreign Object Removal from Eye
Vision correction
Procedures Most Often Billed to Medicare
15 services · 15 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Photography of the retina | Treatment | 92250 |
15 | Less often than most peers in Optometrist |
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 optometrists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other optometrists in Fremont 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2000 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Photography of the retina 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dien Nguyen?
Dien Nguyen is an optometrist in Fremont, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Dien Nguyen's address?
Dien Nguyen is listed at 39400 Paseo Padre Pkwy, Fremont, CA 94538. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dien Nguyen?
The number on file is (510) 248-3367. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dien Nguyen?
Dien Nguyen's National Provider Identifier is 1770636557. 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 Dien Nguyen train?
Dien Nguyen attended Other, graduating in 2000. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dien Nguyen have?
Dien Nguyen has 26 years experience. Calculated from a graduation year of 2000, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dien Nguyen perform?
According to Medicare billing data, Dien Nguyen provides treatments such as photography of the retina. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dien Nguyen's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dien 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.