Are you John Y. Wong, O.D.? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 20211 Patio Dr, Suite 100, Castro Valley, CA 94546
About Dr. Wong
Listed in the NPI registry as an optometrist, John Y. Wong, O.D. practices in Castro Valley, CA. John graduated from Southern California College of Optometry in 2005. Medicare claims data shows John provided 73 services to 71 patients. The services billed most often include established patient complete exam of visual system and photography of the retina. NPI 1457371619 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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) 881-4401
- Email not available
Practice Locations
20211 PATIO DR SUITE 100
Castro Valley, CA 94546
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
Contact lens issues
Cornea conditions
Corneal issues
Eye conditions
Eye discomfort
Eye diseases
Eye infections
Eye inflammation
Eye injuries
Eye irritation
Eye surface issues
Eyelid conditions
Eyelid issues
Pediatric eye conditions
Pupil issues
Tear duct issues
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
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
Minor procedures
Specialty lenses
Surgical evaluations
Tear duct procedures
Therapy
Urgent care
Vision correction
Procedures Most Often Billed to Medicare
73 services · 71 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient complete exam of visual system | Treatment | 92014 |
37 | Less often than most peers in Optometrist |
| Photography of the retina | Treatment | 92250 |
36 | As often as other 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 3
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 Castro Valley 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Southern California College of Optometry 8
Other providers in the same specialty who trained at the same institution.
Class of 2005 at Southern California College of Optometry 8
Providers who graduated from the same medical school in the same year.
Also performs Established patient complete exam of visual system 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is John Y. Wong?
John Y. Wong is an optometrist in Castro Valley, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is John Y. Wong's address?
John Y. Wong is listed at 20211 Patio Dr Suite 100, Castro Valley, CA 94546. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with John Y. Wong?
The number on file is (510) 881-4401. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for John Y. Wong?
John Y. Wong's National Provider Identifier is 1457371619. 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 John Y. Wong train?
John Y. Wong attended Southern California College of Optometry, graduating in 2005. This comes from the CMS National Downloadable File.
CMS public data
How much experience does John Y. Wong have?
John Y. Wong has 21 years experience. Calculated from a graduation year of 2005, reported in the CMS National Downloadable File.
CMS public data
What procedures does John Y. Wong perform?
According to Medicare billing data, John Y. Wong provides treatments such as established patient complete exam of visual system and photography of the retina. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is John Y. Wong's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by John Y. Wong. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.