Physician Profile
Unclaimed ProfileAbout CHANG
Based in Stanford, CA, Robert T Chang, MD is listed in the NPI registry under ophthalmology. Robert graduated from University of Missouri, Columbia School of Medicine in 2002. Robert is also listed as specializing in ophthalmology — glaucoma. According to Medicare claims data, Robert cared for 2,558 Medicare patients across 3,084 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (650) 723-4000
- Email not available
Practice Locations
300 PASTEUR DR
Stanford, CA 94305
Procedures Most Often Billed to Medicare
3,084 services · 2,558 patients · 22 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
102 |
| Removal of recurring cataract in lens capsule using a laser | Procedure | 66821 |
42 |
| Laser repair to improve eye fluid flow | Procedure | 65855 |
39 |
| Extracapsular removal of cataract with insertion of artificial lens and insertion of drainage device in front chamber of eye | Procedure | 66991 |
27 |
| Complex removal of cataract with insertion of prosthetic lens | Procedure | 66982 |
23 |
| Creation of shunt to improve eye fluid flow using tissue graft | Procedure | 66180 |
15 |
| Ultrasound scan of cornea to determine thickness | Imaging | 76514 |
97 |
| Imaging of optic nerve | Treatment | 92133 |
492 |
| Exam of visual field with extended testing | Treatment | 92083 |
467 |
| Ct scan of cornea | Treatment | 92025 |
157 |
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.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
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 ophthalmology specialists in Stanford 8
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at University of Missouri, Columbia School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2002 at University of Missouri, Columbia School of Medicine 7
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 CA who bill this service to Medicare most often.
Common questions
What does Dr. Chang specialize in?
Dr. Chang is an ophthalmology in Stanford, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “OPHTHALMOLOGY”.
NPI registry
Where is Dr. Chang located?
Dr. Chang is listed at 300 PASTEUR DR, Stanford, CA 94305. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Chang's phone number?
The number on file is (650) 723-4000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Chang's NPI number?
Dr. Chang's National Provider Identifier is 1417044280. 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 go to medical school?
Dr. Chang attended University of Missouri, Columbia School of Medicine, graduating in 2002. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Chang been practicing?
Dr. Chang has 24 years experience. Calculated from a graduation year of 2002, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Chang do most often?
According to Medicare billing data, Dr. Chang performs procedures including removal of cataract with insertion of prosthetic lens, removal of recurring cataract in lens capsule using a laser and laser repair to improve eye fluid flow; reads or performs imaging such as ultrasound scan of cornea to determine thickness; provides treatments such as imaging of optic nerve and exam of visual field with extended testing, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Chang confirmed this information?
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.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.