William to, OD
NPI 1952756678 · Optometrist · San Mateo, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William to, OD is a Optometrist provider in San Mateo, CA (NPI 1952756678).
Provider details
- NPI number
- 1952756678
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 34153TLG (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
485 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 203 | $158 |
| Photography of the Retina92250 | 57 | $44 |
| Imaging of Retina92134 | 56 | $48 |
| Exam of Visual Field With Extended Testing92083 | 52 | $73 |
| Imaging of Optic Nerve92133 | 51 | $40 |
| Ultrasound Scan of Cornea to Determine Thickness76514 | 14 | $13 |
| Exam of the Internal Drainage System of Eye |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 103 | 27 |
| Latanoprostene Bunodbrand: Vyzulta | 49 | — |
| Bimatoprostbrand: Lumigan | 44 | — |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 37 | — |
| Timolol Maleate | 25 | — |
| Lifitegrastbrand: Xiidra | 20 | — |
| Prednisolone Acetate | 17 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,010 across 19 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 9309 Glacier Hwy Ste A103Juneau, AK 99801-9300Phone: (907) 789-3175Fax: (844) 903-4362
- 377 Santana Row Ste 1115San Jose, CA 95128-2058Phone: (408) 502-5020Fax: (408) 389-8261
- 6000 Bollinger Canyon Rd Ste 1104San Ramon, CA 94583-2305Phone: (925) 725-1745Fax: (925) 725-7922
Registry dates
- Enumerated
- 2016-05-02
- Last updated
- 2025-09-03
- Certified
- 2025-09-03
Frequently asked questions
- What is William to's NPI number?
- William to's National Provider Identifier (NPI) is 1952756678, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William to's specialty?
- William to is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is William to located?
- William to's practice location on file with NPPES is 194 Hillsdale Shopping Center, San Mateo, CA 94403-3409.
- What is William to's phone number?
- The practice phone number listed in the NPPES registry for William to is (650) 341-8080.
- Does William to accept Medicare?
- William to is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William to's NPI active?
- Yes — William to's NPI (1952756678) is active in the NPPES registry as of the last update on 2025-09-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.