Yingna Liu, MD
Yingna Liu, MD is a Retina Specialist (Ophthalmology) Physician in Tracy, CA, registered under NPI 1932631462. 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
The practice address on file is 2160 W GRANT LINE RD STE 240, Tracy, CA 95377. 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 |
|---|---|---|
| A157345 | CA | Retina Specialist (Ophthalmology)… primary |
| A157345 | CA | Uveitis and Ocular Inflammatory Disease… |
This provider holds licence A157345 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
- 2860894896
- Enrollment ID
- I20231006002021
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 Retina Specialist covers
An ophthalmologist who specializes in the diagnosis and treatment of vitreoretinal diseases. NUCC Health Care Provider Taxonomy, code 207WX0107X
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 | |
|---|---|---|---|---|
| 207WX0107X | Retina Specialist (Ophthalmology) Physician Retina Specialist | A157345 | CA | primary |
| 207WX0108X | Uveitis and Ocular Inflammatory Disease (Ophthalmology) Physician Uveitis and Ocular Inflammatory Disease | A157345 | 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 | 1932631462 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 3, 2017 |
| Last updated | Mar 27, 2024 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
2160 W GRANT LINE RD STE 240 Tracy, CA 95377 (800) 573-8462 Fax (925) 623-5090 |
| Mailing address |
365 LENNON LN STE 250 Walnut Creek, CA 94598 |
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 | 3 | 2 | 6 | 3 | 1 | 4 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 6 | 2 | 3 | 3 | 2 | 4 | 3 |
Sum = 58 · next multiple of 10 = 60 · check digit = 2 · actual last digit = 2
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.