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Edit this profileAt a glance
- 680 Macon Rd, Mountain View, CA 94035
About Dr. Chang
Listed in the NPI registry as an optometrist, Lilly Chang, OD practices in Mountain View, CA. Lilly graduated from New England College of Optometry in 2019. Medicare claims data shows Lilly provided 3,330 services to 3,311 patients. The services billed most often include established patient complete exam of visual system, new patient complete exam of visual system, and established patient problem focused exam of visual system. NPI 1619521259 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
- (650) 603-8766
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
680 MACON RD
Mountain View, CA 94035
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
3,330 services · 3,311 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient complete exam of visual system | Treatment | 92014 |
1,359 | More than most peers in Optometrist |
| New patient complete exam of visual system | Treatment | 92004 |
1,298 | More than most peers in Optometrist |
| Established patient problem focused exam of visual system | Treatment | 92012 |
459 | More than most peers in Optometrist |
| New patient problem focused exam of visual system | Treatment | 92002 |
202 | More than most peers in Optometrist |
| Photography of the retina | Treatment | 92250 |
12 | 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 in Mountain View 8
Same specialty, same city.
Trained at New England College of Optometry 8
Other providers in the same specialty who trained at the same institution.
Class of 2019 at New England College of Optometry 8
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
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 Dr. Chang?
Dr. Chang is an optometrist in Mountain View, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Dr. Chang's address?
Dr. Chang is listed at 680 Macon Rd, Mountain View, CA 94035. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Chang?
The number on file is (650) 603-8766. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Chang?
Dr. Chang's National Provider Identifier is 1619521259. 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 Dr. Chang train?
Dr. Chang attended New England College of Optometry, graduating in 2019. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Chang have?
Dr. Chang has 7 years experience. Calculated from a graduation year of 2019, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Chang perform?
According to Medicare billing data, Dr. Chang provides treatments such as established patient complete exam of visual system and new patient complete exam of visual system. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Chang's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Chang. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.