Stephen Chun, OD, FAAO
Stephen Chun, OD, FAAO is a provider specialising in Vision Therapy Optometrist in Berkeley, CA, registered under NPI 1942366133. This provider registers 7 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 2414 SHATTUCK AVE, Berkeley, CA 94704. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 5835TLG | CA | Vision Therapy Optometrist primary |
| 5835TLG | CA | Optometrist |
| 5835TLG | CA | Corneal and Contact Management Optometrist |
| 5835TLG | CA | Low Vision Rehabilitation Optometrist |
| 5835TLG | CA | Pediatric Optometrist |
| 5835TLG | CA | Sports Vision Optometrist |
| 5835TLG | CA | Occupational Vision Optometrist |
This provider holds licence 5835TLG 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 - Optometry
- PAC ID
- 5890846760
- Enrollment ID
- I20090706000683
Medicare enrolment is recorded as approved under the provider type Practitioner - Optometry. 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 Vision Therapy covers
Optometrists who specialize in vision therapy as a treatment process used to improve vision function. It includes a broad range of developmental and rehabilitative treatment programs individually prescribed to remediate specific sensory, motor and/or visual perceptual dysfunctions. NUCC Health Care Provider Taxonomy, code 152WV0400X
All registered taxonomy codes
This provider registers 7 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 152WV0400X | Vision Therapy Optometrist Vision Therapy | 5835TLG | CA | primary |
| 152W00000X | Optometrist | 5835TLG | CA | |
| 152WC0802X | Corneal and Contact Management Optometrist Corneal and Contact Management | 5835TLG | CA | |
| 152WL0500X | Low Vision Rehabilitation Optometrist Low Vision Rehabilitation | 5835TLG | CA | |
| 152WP0200X | Pediatric Optometrist Pediatrics | 5835TLG | CA | |
| 152WS0006X | Sports Vision Optometrist Sports Vision | 5835TLG | CA | |
| 152WX0102X | Occupational Vision Optometrist Occupational Vision | 5835TLG | CA |
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 | 1942366133 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 29, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | OD, FAAO |
| Practice address |
2414 SHATTUCK AVE Berkeley, CA 94704 (510) 843-1228 Fax (510) 524-1062 |
| Other identifiers |
SD005835
· Medicaid (CA) |
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 | 9 | 4 | 2 | 3 | 6 | 6 | 1 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 8 | 2 | 6 | 6 | 3 | 1 | 6 |
Sum = 67 · next multiple of 10 = 70 · check digit = 3 · actual last digit = 3
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.