Lena Yin, PT
Lena Yin, PT is a Geriatric Physical Therapist in San Mateo, CA, registered under NPI 1689544751. 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 525 DORCHESTER RD, San Mateo, CA 94402. 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 |
|---|---|---|
| 22866 | CA | Geriatric Physical Therapist primary |
This provider holds licence 22866 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 - Physical Therapist In Private Practice
- PAC ID
- 4981199064
- Enrollment ID
- I20251217001148
Medicare enrolment is recorded as approved under the provider type Practitioner - Physical Therapist In Private Practice. 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 Geriatrics covers
A licensed physical therapist, including but not limited to an individual who is a Board Certified Specialist in Geriatric Physical Therapy, who has demonstrated specialized knowledge and skill in the comprehensive biopsychosocial assessment and evidence-based management of movement in aging adults. This includes, but is not limited to, specialized knowledge in and consideration of normal age-related changes and pathological manifestations across all systems; cognition and mental health; polypharmacy; fall risk mitigation; bone health; healthy and active aging, and socioeconomic and health policy issues affecting aging adults. The geriatric physical therapist is an integral part of the interdisciplinary geriatric team and serves as an advocate for the highest level of well-being for the older adult. NUCC Health Care Provider Taxonomy, code 2251G0304X
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 | 1689544751 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 5, 2025 |
| Last updated | Nov 5, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | PT |
| Practice address |
525 DORCHESTER RD San Mateo, CA 94402 (650) 766-6938 |
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 | 6 | 8 | 9 | 5 | 4 | 4 | 7 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 7 | 9 | 1 | 4 | 8 | 7 | 1 |
Sum = 69 · next multiple of 10 = 70 · check digit = 1 · actual last digit = 1
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.