Emily Chang
Emily Chang is an Ophthalmology Physician in Oakland, CA, registered under NPI 1003311820. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Oakland, based on OpenStreetMap data collected Sep 18, 2026. Parking is available about 0.21 mi away. There is EV charging 0.21 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 361 ft away, served by West MacArthur Boulevard & Howe Street. A pharmacy sits 0.26 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.23 mi away.
Getting here and what is nearby
Parking Kaiser Permanente Medical Center - Parking Garage 248 ft ~1 min
3800 Howe Street
Restaurant Doña 266 ft ~2 min
Restaurant Laughing Buddha 270 ft ~2 min
3766 Piedmont Avenue
Mo-Tu,Th 11:30-15:00,17:00-21:00; We off; Fr-Su 12:00-21:00
Restaurant Mägo 281 ft ~2 min
3762 Piedmont Avenue
Transit West MacArthur Boulevard & Piedmont Avenue 308 ft ~2 min
Transit Fabiola Building 358 ft ~2 min
Transit West MacArthur Boulevard & Howe Street 361 ft ~2 min
Pharmacy Kaiser Oakland Medical Center Pharmacy 653 ft ~3 min
Pharmacy Kaiser Broadway Pharmacy 685 ft ~3 min
Gas station Quick Food & Gas 760 ft ~3 min
Broadway
Parking Kaiser Permanente Medical Center - Parking Garage 776 ft ~3 min
3701;3735;3737;3741;3757;3781;3785;3793;3799 Broadway
Hotel Westwind Lodge 838 ft ~4 min
336 West MacArthur Boulevard
Coffee Me & Jungle 890 ft ~4 min
3943 Piedmont Avenue, Oakland 94611
Grocery Monte Vista Food Center 1,020 ft ~4 min
Coffee Blue Bottle Coffee 0.21 mi ~5 min
EV charging 0.21 mi ~5 min
Parking 0.21 mi ~5 min
3466 Broadway, Oakland
Coffee The Posh Bagel 0.23 mi ~5 min
Grocery Piedmont Grocery 0.23 mi ~5 min
Gas station Broadway 76 0.24 mi ~5 min
Convenience Mon Superette 0.26 mi ~6 min
4060 Piedmont Avenue
Pharmacy CVS Pharmacy 0.26 mi ~6 min
Gas station A & P 0.27 mi ~6 min
Convenience Quick Stop 0.28 mi ~6 min
66 MacArthur Boulevard
Convenience 7-Eleven 0.32 mi ~7 min
Hotel Imperial Inn 0.45 mi ~10 min
Grocery Sprouts Farmers Market 0.46 mi ~10 min
3001;3015;3025;3039 Broadway, Oakland 94611
Mo-Su 07:00-22:00
Hotel Inn at Temescal 0.48 mi ~10 min
3720 Telegraph Avenue
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| A178363 | CA | Ophthalmology Physician primary |
This provider holds licence A178363 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Ophthalmology
- PAC ID
- 6800262692
- Enrollment ID
- I20221019001961
Medicare enrolment is recorded as approved under the provider type Practitioner - Ophthalmology. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Ophthalmology covers
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses. NUCC Health Care Provider Taxonomy, code 207W00000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207W00000X | Ophthalmology Physician | A178363 | CA | primary |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003311820 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 25, 2018 |
| Last updated | Sep 29, 2022 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Practice address |
3772 HOWE ST Oakland, CA 94611 (510) 752-1235 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 3 | 1 | 1 | 8 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 1 | 2 | 8 | 4 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.